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diff --git a/topics/_week7_eval_cl.mdwn b/topics/_week7_eval_cl.mdwn
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+++ b/topics/_week7_eval_cl.mdwn
@@ -7,7 +7,7 @@
 We've discussed evaluation order before, primarily in connection with
 the untyped lambda calculus.  Whenever a term contains more than one
 redex, we have to choose which one to reduce, and this choice can make
 We've discussed evaluation order before, primarily in connection with
 the untyped lambda calculus.  Whenever a term contains more than one
 redex, we have to choose which one to reduce, and this choice can make

-a difference.  For instance, in the term `((\x.I)(ωω)`, if we reduce
+a difference.  For instance, in the term `((\x.I)(ωω))`, if we reduce

 the leftmost redex first, the term reduces to the normal form `I` in
 one step.  But if we reduce the left most redex instead (namely,
 `(ωω)`), we do not arrive at a normal form, and are in danger of
 the leftmost redex first, the term reduces to the normal form `I` in
 one step.  But if we reduce the left most redex instead (namely,
 `(ωω)`), we do not arrive at a normal form, and are in danger of