I am not a new knitter but this pattern is odd. I can't seem to figure out the second row. I don't beleive there is an error as there has been no update on it.
And, what is the need for parentheses?
Step 1: Using US 9, cast on 42 stitches.
Step 2: K3 (p2 k2) to last 3 sts, p3.
Step 3: Work in ribbing until you have 4 rows total.
Step 2 makes no sense. There are not 3 stitches left to p3. 7 divides into 42 stitches evenly wth no leftovers.