$2$D Integral: Algebraic expression

Solve the integral $V={\displaystyle \underset{0}{\overset{1}{}}}{\displaystyle \underset{3x}{\overset{-2x+5}{}}}(10-4x-2y)dydx$ with numerical integration.

Script $o.$

Assessment:

Check integral$\_$value $=8\mathrm{.}3333.$

Check integral$2$ is used.