Fix logarithms formatting

exercises/logarithms_1.html

@@ -40,11 +40,11 @@
 		</div>
 
 		<div class="hints">
-			<p>If <code>log_{b}x=y</code>, then <code>b^y=x</code></p>
+			<p>If <code>\log_{b}x=y</code>, then <code>b^y=x</code></p>
 			<p>First, try to write <code><var>number</var></code>, the number we are taking the logarithm of, as a power of <code><var>base</var></code>, the base of the logarithm.</p>
 			<p><code><var>number</var></code> can be expressed as <code><var>power_string</var></code>.</p>
 			<p><code><var>number</var></code> can be expressed as <code><var>base</var>^<var>answer</var></code>.</p>
-			<p><code><var>base</var>^<var>answer</var>=<var>number</var></code>, so <code>log_{<var>base</var>}<var>number</var>=<var>answer</var></code>.</p>
+			<p><code><var>base</var>^<var>answer</var>=<var>number</var></code>, so <code>\log_{<var>base</var>}<var>number</var>=<var>answer</var></code>.</p>
 		</div>
 	</div>
 </body>

exercises/logarithms_2.html

@@ -14,7 +14,7 @@
 
 		<div class="problems">
 			<div>
-				<p class="problem">Rewrite the following in the form <code>log(c)</code>.</p>
+				<p class="problem">Rewrite the following in the form log(c).</p>
 				<p class="question"><code>\log(<var>A</var>) + \log(<var>B</var>)</code></p>
 				<p class="solution" data-type="regex">^(log\(|)<var>C</var>(\)|)$</p>
 				<div class="hints">
@@ -25,7 +25,7 @@
 			</div>
 
 			<div>
-				<p class="problem">Rewrite in the form log(c)</p>
+				<p class="problem">Rewrite in the form log(c).</p>
 				<p class="question"><code>\log(<var>C</var>) - \log(<var>A</var>)</code></p>
 				<p class="solution" data-type="regex">^(log\(|)<var>B</var>(\)|)$</p>
 				<div class="hints">
@@ -36,7 +36,7 @@
 			</div>
 
 			<div>
-				<p class="problem">Rewrite in the form log(c)</p>
+				<p class="problem">Rewrite in the form log(c).</p>
 				<p class="question"><code><var>A</var>\log(<var>B</var>)</code></p>
 				<p class="solution" data-type="regex">^(log\(|)<var>pow( B, A )</var>(\)|)$</p>
 				<div class="hints">