diff --git a/exam-2/exam2.md b/exam-2/exam2.md
index 815f649..3cd65da 100644
--- a/exam-2/exam2.md
+++ b/exam-2/exam2.md
@@ -68,8 +68,8 @@ author: |
    x$ axis, its tail pointing upwards in the $+y$ direction and its nose facing
    in the $+z$ direction. Derive a sequence of model transformation matrices
    that can be applied to the vertices of the airplane to position it in space
-   at the location $p = (4, 4, 7)$, with a direction of flight $w = (2, 1, –2)$
-   and the wings aligned with the direction $d = (–2, 2, –1)$.}
+   at the location $p = (4, 4, 7)$, with a direction of flight $w = (2, 1, -2)$
+   and the wings aligned with the direction $d = (-2, 2, –1)$.}
 
    The translation matrix is
 
@@ -93,7 +93,7 @@ author: |
    transform it to $(2, 1, -2)$.
 
 8. Consider the perspective projection-normalization matrix P which maps the
-   contents of the viewing frustum into a cube that extends from –1 to 1 in $x,
+   contents of the viewing frustum into a cube that extends from -1 to 1 in $x,
    y, z$ (called normalized device coordinates).
 
    Suppose you want to define a square, symmetric viewing frustum with a near
@@ -140,7 +140,7 @@ author: |
     patch, it can be inefficient to separately represent each triangle in the
     patch independently as a set of three vertices because memory is wasted when
     the same vertex location has to be specified multiple times. A triangle
-    strip offers a memory-efficient method for representing connected ‘strips’
+    strip offers a memory-efficient method for representing connected 'strips'
     of triangles. For example, in the diagram below, the six vertices v0 .. v5
     define four adjacent triangles: (v0, v1, v2), (v2, v1, v3), (v2, v3, v4),
     (v4, v3, v5). [Notice that the vertex order is switched in every other