diff --git a/Perspective.ipynb b/Perspective.ipynb
index 46da1fc..5dfa5bd 100644
--- a/Perspective.ipynb
+++ b/Perspective.ipynb
@@ -72,9 +72,11 @@
     "After the perspective divide, all values are clipped to be inside a $2\\times2\\times2$ cube centered at the origin so that. So that\n",
     "\n",
     "$$\n",
+    "\\begin{align}\n",
     "-1 \\le v''_x \\le 1\\\\\n",
     "-1 \\le v''_y \\le 1\\\\\n",
-    "-1 \\le v''_z \\le 1\\\\\n",
+    "-1 \\le v''_z \\le 1\n",
+    "\\end{align}\n",
     "$$\n",
     "\n",
     "*Side note*: Direct3D's clipping bounds are different than OpenGL's, so $f$ needs to be different for it.\n"