$\begin{array}{r} 3(-2)^2 - 5(3) + 8 \quad \;\;\; \\ 3(4) - 15 + 8 \quad \;\;\; \\ 12 - 15 + 8 \quad \;\;\; \\ -3 + 8 = 5 \end{array}$

$\begin{array}{l} \frac{2}{3}\left(3\right)-5\left(-2\right)\\ 2-\left(-10\right)\\ 2+10=12 \end{array}$

$-7$