$\int\left(3x^2-2\right)^5\left(9x^2\right)dx$

$\int\frac{\left(4-x^2\right)}{x^2}dx$

$-12+27-14-19+63-28$

$\frac{4x}{2x+3}+\frac{6}{2x+3}$

$-4mn+2n-3m-2mn+2m$

$\log\left(5\right)\sqrt{\frac{\left(x-1\right)^2}{\left(x-3\right)\left(x+2\right)^3}}$

$\frac{x}{100}-\frac{y^2z^4}{81}$