diff --git a/internal/cards/calc.go b/internal/cards/calc.go
index 81b92e0..9ec835d 100644
--- a/internal/cards/calc.go
+++ b/internal/cards/calc.go
@@ -26,9 +26,11 @@ import (
 )
 
 const calcExtraHead = `
+<!-- Import KaTeX for math rendering -->
 <link rel="stylesheet" href="/static/katex.min.css">
 <script defer src="/static/katex.min.js"></script>
 
+<!-- Import Nerdamer for equation evaluator -->
 <script src="/static/nerdamer.core.js"></script>
 <script src="/static/Algebra.js"></script>
 <script src="/static/Calculus.js"></script>
@@ -38,7 +40,9 @@ const solveRenderScript = `
 <div id="calc-content" class="subtitle mx-2 my-0"></div>
 <script>
 window.onload = () => {
-	latex = nerdamer.convertToLaTeX(nerdamer('%s').toString())
+	// Execute input and get output as LaTeX
+	latex = nerdamer('%s').latex()
+	// Use KaTeX to render output to #calc-content div
 	katex.render(latex, document.getElementById('calc-content'))
 }
 </script>`
diff --git a/internal/cards/plot.go b/internal/cards/plot.go
index 1454ac8..730e4c3 100644
--- a/internal/cards/plot.go
+++ b/internal/cards/plot.go
@@ -35,6 +35,7 @@ const plotExtraHead = `
 const plotScript = `
 <div id="plot-content" class="container"></div>
 <script>
+// Create function to draw plot in #plot-content
 plotFn = () => functionPlot({
 	target: '#plot-content',
 	grid: true,
@@ -43,6 +44,7 @@ plotFn = () => functionPlot({
 		fn: '%s'
 	}]
 })
+// Create resize observer that runs plot function
 new ResizeObserver(plotFn).observe(document.getElementById('plot-content'))
 </script>`
 
diff --git a/main.go b/main.go
index c51c5e8..54d63f0 100644
--- a/main.go
+++ b/main.go
@@ -26,6 +26,8 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"path"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"