Find $\int - 3 \left( e ^ { x / 2 } + 1 \right) d x$

Short Answer

Find: $\int - 3 \left( e ^ { x / 2 } + 1 \right) d x$ Enter your terms in the same order in which they appear in the integral with each term in standard power function form; any fractions reduced form $\frac { a } { b }$ .