Complete printing cleanup, rebased into one

common/lib/xmodule/xmodule/css/capa/display.scss

@@ -269,6 +269,13 @@ div.problem {
       }
     }
 
+    // Hides equation previews in symbolic response problems when printing
+    [id^='display'].equation {
+      @media print {
+        display:none;
+      }
+    }
+
     span {
       &.unanswered, &.ui-icon-bullet {
         display: inline-block;
@@ -628,6 +635,10 @@ div.problem {
       height: ($baseline*2);
       vertical-align: middle;
       font-weight: 600;
+
+      @media print {
+        display: none;
+      }
     }
 
     .save {

common/lib/xmodule/xmodule/css/sequence/display.scss

@@ -40,6 +40,10 @@ $sequence--border-color: #C8C8C8;
   position: relative;
   border-bottom: none;
 
+  @media print {
+    display: none;
+  }
+
   .left-shadow {
     @extend %ui-depth4;
     @include linear-gradient(left, $shadow, $transparent);
@@ -277,6 +281,10 @@ nav.sequence-bottom {
   height: 1px;
   margin: lh(2) auto;
   text-align: center;
+
+  @media print {
+    display: none;
+  }
 }
 
 #seq_content {