docs: update Markdown equation elements

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

@@ -32,6 +32,11 @@ The [inverse complementary error function][erfcinv] is defined as
 \mathop{\mathrm{erfc}}^{-1}(1-z) = \mathop{\mathrm{erf}}^{-1}(z)
 ```
 
+<!-- <div class="equation" align="center" data-raw-text="\operatorname{erfc}^{-1}(1-z) = \operatorname{erf}^{-1}(z)" data-equation="eq:inverse_complementary_error_function">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@ed4c0691c112c821dc594a517a9787b42278ed89/lib/node_modules/@stdlib/math/base/special/erfcinvf/docs/img/equation_inverse_complementary_error_function.svg" alt="Inverse complementary error function.">
+    <br>
+</div> -->
+
 <!-- </equation> -->
 
 where `erf^{-1}(z)` is the [inverse error function][@stdlib/math/base/special/erfinv].

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

@@ -32,6 +32,11 @@ The [inverse error function][inverse-error-function] is defined in terms of the
 \mathop{\mathrm{erf}}^{-1}(z)=\sum_{k=0}^\infty\frac{c_k}{2k+1}\left (\frac{\sqrt{\pi}}{2}z\right )^{2k+1}
 ```
 
+<!-- <div class="equation" align="center" data-raw-text="\operatorname{erf}^{-1}(z)=\sum_{k=0}^\infty\frac{c_k}{2k+1}\left (\frac{\sqrt{\pi}}{2}z\right )^{2k+1}" data-equation="eq:inverse_error_function">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@ed4c0691c112c821dc594a517a9787b42278ed89/lib/node_modules/@stdlib/math/base/special/erfinvf/docs/img/equation_inverse_error_function.svg" alt="Inverse error function.">
+    <br>
+</div> -->
+
 <!-- </equation> -->
 
 where `c_0 = 1` and
@@ -42,6 +47,11 @@ where `c_0 = 1` and
 c_k=\sum_{m=0}^{k-1}\frac{c_m c_{k-1-m}}{(m+1)(2m+1)} = \left\{1,1,\frac{7}{6},\frac{127}{90},\frac{4369}{2520},\frac{34807}{16200},\ldots\right\}
 ```
 
+<!-- <div class="equation" align="center" data-raw-text="c_k=\sum_{m=0}^{k-1}\frac{c_m c_{k-1-m}}{(m+1)(2m+1)} = \left\{1,1,\frac{7}{6},\frac{127}{90},\frac{4369}{2520},\frac{34807}{16200},\ldots\right\}" data-equation="eq:inverse_error_function_series_coefficients">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@ed4c0691c112c821dc594a517a9787b42278ed89/lib/node_modules/@stdlib/math/base/special/erfinvf/docs/img/equation_inverse_error_function_series_coefficients.svg" alt="Series coefficients.">
+    <br>
+</div> -->
+
 <!-- </equation> -->
 
 </section>