Revert "Literal expression don't follow PEMDAS"
Revert "Literal expression don't follow PEMDAS"

FIXED by last commit.
The generation for plus/minus code is must
not be done is this phase in order to
preserve the precedence between operations.

This reverts commit 9e9cae0c79af28120f0b2ea21fb19c419d6d403a.

castillo-n/compiler,leandrohga/cs4298_MacNCheese,castillo-n/compiler,leandrohga/cs4298_MacNCheese