$3a^3-3a^2+9a^2-a^2+ab-3b^2$

$tan^2\left(x\right)-\tan\left(x\right)$

$\int\left(\frac{\left(\frac{59}{4}x\right)}{\left(x^2+x+2\right)}\right)dx$

$\frac{dy}{dx}\ln\left(y\right)=ye^x$

$27r^2-12$

$\left(cos\left(x\right)-1\right)\left(2cos\left(x\right)+3\right)$

$\left(2s+o-4n\right)^2$