$\frac{5}{6}a+\frac{3}{5}ab^2$

$\frac{x^{4}+2x^{2}-2x+35}{x+3}$

$\left(9m+2m^{x-5}\right)\left(2^{x-5}+m\right)$

$6-3-\left(-3\right)$

$2\cdot\left[-3+5-\left(12-20+5-7+3\right)+4-\left(9-12+3+6+9\right)\right]$

$2\int_0^{\pi}\left(sin^2xcos^2x\right)dx$

$4+4\cdot7$