Answer
$-9a-13$
Work Step by Step
After using the distributive property, we group like terms to ease simplification. We then combine like terms to simplify the expression:
$2a-5(a+3)-2(a-1)-4a$
=$2a-5a-15-2a+2-4a$
=$2a-5a-2a-4a-15+2$
=$(2a-5a-2a-4a)+(-15+2)$
=$(-9a)+(-13)$
=$-9a-13$
