$\int\:\frac{-x+2}{\left(x^2+1\right)^2}dx$

$\int_1^3x\cdot\left(1+2i\left(x-2\right)\right)dx$

$\int e^{3x}\left(1-e^{3x}\right)^{2}dx$

$2a\frac{1}{3}\left(ab\frac{1}{2}\right)^{\frac{2}{3}}$

$5\left(-8+5\right)-4$

$\frac{10}{7}+2m+2m-5$

$\left(1\right)^2\left(-1\right)-\left(1-1\right)-8$