diff --git a/spice/rvals-theory2.md b/spice/rvals-theory2.md
index 54d0434..805d9ce 100644
--- a/spice/rvals-theory2.md
+++ b/spice/rvals-theory2.md
@@ -23,7 +23,7 @@ $47 \Omega$ resistors are already available.
 ## 950Hz-1050Hz
 
 ### low-pass
-$((68 \parallel 68) \parallel (68 \ parallel 68)) = 17 \Omega$
+$((68 \parallel 68) \parallel (68 \parallel 68)) = 17 \Omega$
 
 ### high-pass
 $(10 \parallel 10) + 10 = 15 \Omega$
@@ -42,7 +42,7 @@ $22 + 22 + 1 + 1 = 46 \Omega$
 $(10 \parallel 10) + (47 \parallel 3.3) + 10 = 18.083 \Omega$
 
 ## high-pass
-$(22 \parallel 22) + 1 + 1 + 1 = 14 \Omega$ (better tolerance)
+$(22 \parallel 22) + 1 + 1 + 1 = 14 \Omega$ **(better tolerance)**
 
-Alternative: $10 + 1 + 1 + 1 + 1 = 14 \Omega$ (worse tolerance)
+Alternative: $10 + 1 + 1 + 1 + 1 = 14 \Omega$ **(worse tolerance)**