Select the correct answer.
A mistake was made in the steps shown to simplify the expression. Which step includes the mistake?
¹+²+ -10 + 2
Step 1: ¹+²+ 10 ÷ 2
=
Step 2:¹9 + 10 +
Step 3:= + 10 + 2
Step 4: 2+ 10 + 2
Step 5:= 12 + 2
Step 6:= 6