docs: update equations

Author: Planeshifter

lib/node_modules/@stdlib/math/base/special/acovercos/README.md

@@ -29,7 +29,7 @@ The [inverse coversed cosine][inverse-coversed-cosine] is defined as
 <!-- <equation class="equation" label="eq:arccovercosine" align="center" raw="\operatorname{acovercos}(\theta) = \arcsin(1+\theta)" alt="Inverse coversed cosine."> -->
 
 ```math
-\operatorname{acovercos}(\theta) = \arcsin(1+\theta)
+\mathop{\mathrm{acovercos}}(\theta) = \arcsin(1+\theta)
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{acovercos}(\theta) = \arcsin(1+\theta)" data-equation="eq:arccovercosine">

lib/node_modules/@stdlib/math/base/special/acoversin/README.md

@@ -29,7 +29,7 @@ The [inverse coversed sine][inverse-coversed-sine] is defined as
 <!-- <equation class="equation" label="eq:arccoversine" align="center" raw="\operatorname{acoversin}(\theta) = \arcsin(1-\theta)" alt="Inverse coversed sine."> -->
 
 ```math
-\operatorname{acoversin}(\theta) = \arcsin(1-\theta)
+\mathop{\mathrm{acoversin}}(\theta) = \arcsin(1-\theta)
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{acoversin}(\theta) = \arcsin(1-\theta)" data-equation="eq:arccoversine">

lib/node_modules/@stdlib/math/base/special/ahavercos/README.md

@@ -29,7 +29,7 @@ The [inverse half-value versed cosine][archavercosine] is defined as
 <!-- <equation class="equation" label="eq:archavercosine" align="center" raw="\operatorname{ahavercos}(\theta) = 2 \cdot \arccos(\sqrt{\theta})" alt="Inverse half-value versed cosine."> -->
 
 ```math
-\operatorname{ahavercos}(\theta) = 2 \cdot \arccos(\sqrt{\theta})
+\mathop{\mathrm{ahavercos}}(\theta) = 2 \cdot \arccos(\sqrt{\theta})
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{ahavercos}(\theta) = 2 \cdot \arccos(\sqrt{\theta})" data-equation="eq:archavercosine">

lib/node_modules/@stdlib/math/base/special/ahaversin/README.md

@@ -29,7 +29,7 @@ The [inverse half-value versed sine][archaversine] is defined as
 <!-- <equation class="equation" label="eq:archaversine" align="center" raw="\operatorname{ahaversin}(\theta) = 2 \cdot \arcsin(\sqrt{\theta})" alt="Inverse half-value versed sine."> -->
 
 ```math
-\operatorname{ahaversin}(\theta) = 2 \cdot \arcsin(\sqrt{\theta})
+\mathop{\mathrm{ahaversin}}(\theta) = 2 \cdot \arcsin(\sqrt{\theta})
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{ahaversin}(\theta) = 2 \cdot \arcsin(\sqrt{\theta})" data-equation="eq:archaversine">

lib/node_modules/@stdlib/math/base/special/avercos/README.md

@@ -29,7 +29,7 @@ The [inverse versed cosine][inverse-versed-cosine] is defined as
 <!-- <equation class="equation" label="eq:arcvercosine" align="center" raw="\operatorname{avercos}(\theta) = \arccos(1+\theta)" alt="Inverse versed cosine."> -->
 
 ```math
-\operatorname{avercos}(\theta) = \arccos(1+\theta)
+\mathop{\mathrm{avercos}}(\theta) = \arccos(1+\theta)
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{avercos}(\theta) = \arccos(1+\theta)" data-equation="eq:arcvercosine">

lib/node_modules/@stdlib/math/base/special/aversin/README.md

@@ -29,7 +29,7 @@ The [inverse versed sine][inverse-versed-sine] is defined as
 <!-- <equation class="equation" label="eq:arcversine" align="center" raw="\operatorname{aversin}(\theta) = \arccos(1-\theta)" alt="Inverse versed sine."> -->
 
 ```math
-\operatorname{aversin}(\theta) = \arccos(1-\theta)
+\mathop{\mathrm{aversin}}(\theta) = \arccos(1-\theta)
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{aversin}(\theta) = \arccos(1-\theta)" data-equation="eq:arcversine">

lib/node_modules/@stdlib/math/base/special/beta/README.md

@@ -29,7 +29,7 @@ The [beta function][beta-function], also called the Euler integral, is defined a
 <!-- <equation class="equation" label="eq:beta_function" align="center" raw="\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t" alt="Equation for the beta function."> -->
 
 ```math
-\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t
+\mathop{\mathrm{Beta}}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t" data-equation="eq:beta_function">
@@ -44,7 +44,7 @@ The [beta function][beta-function] is related to the [Gamma function][gamma-func
 <!-- <equation class="equation" label="eq:beta_function2" align="center" raw="\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!" alt="Beta function expressed in terms of the Gamma function."> -->
 
 ```math
-\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!
+\mathop{\mathrm{Beta}}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!" data-equation="eq:beta_function2">

lib/node_modules/@stdlib/math/base/special/betaln/README.md

@@ -29,7 +29,7 @@ The [beta function][beta-function], also called the Euler integral, is defined a
 <!-- <equation class="equation" label="eq:beta_function" align="center" raw="\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t" alt="Equation for the beta function."> -->
 
 ```math
-\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t
+\mathop{\mathrm{Beta}}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{Beta}(x,y) = \int_0^1t^{x-1}(1-t)^{y-1}\,\mathrm{d}t" data-equation="eq:beta_function">
@@ -44,7 +44,7 @@ The [beta function][beta-function] is related to the [gamma function][gamma-func
 <!-- <equation class="equation" label="eq:beta_function2" align="center" raw="\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!" alt="Beta function expressed in terms of the Gamma function."> -->
 
 ```math
-\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!
+\mathop{\mathrm{Beta}}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{Beta}(x,y)=\dfrac{\Gamma(x)\,\Gamma(y)}{\Gamma(x+y)} \!" data-equation="eq:beta_function2">

lib/node_modules/@stdlib/math/base/special/ccis/README.md

@@ -29,7 +29,7 @@ The [cis][cis] function is defined as
 <!-- <equation class="equation" label="eq:cis_function" align="center" raw="\operatorname{cis}(z) = e^{iz} = \cos(z) + i \sin(z)" alt="cis function"> -->
 
 ```math
-\operatorname{cis}(z) = e^{iz} = \cos(z) + i \sin(z)
+\mathop{\mathrm{cis}}(z) = e^{iz} = \cos(z) + i \sin(z)
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{cis}(z) = e^{iz} = \cos(z) + i \sin(z)" data-equation="eq:cis_function">

lib/node_modules/@stdlib/math/base/special/cexp/README.md

@@ -29,7 +29,7 @@ The [exponential][exponential-function] function of a complex number is defined
 <!-- <equation class="equation" label="eq:cexp_function" align="center" raw="\operatorname{exp}(z) = e^{x + i y} = (\exp{x}) (\cos(y) + i \sin(y))" alt="Complex exponential function"> -->
 
 ```math
-\operatorname{exp}(z) = e^{x + i y} = (\exp{x}) (\cos(y) + i \sin(y))
+\mathop{\mathrm{exp}}(z) = e^{x + i y} = (\exp{x}) (\cos(y) + i \sin(y))
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{exp}(z) = e^{x + i y} = (\exp{x}) (\cos(y) + i \sin(y))" data-equation="eq:cexp_function">