$\int\frac{\left(x^5+x^4-x^2-2x-3\right)}{x^3+x^2+x+1}dx$

$-490+18$

$\frac{\left(3a+2b\right)^2-\left(3a-2b\right)^2}{ab}$

$5x^2+8x-3=4x^2+5x+7$

$\left(-2\right)-\left|\left(-6\right)\cdot\left(-14\right)\right|-\left|\left(-15\right)-2\right|$

$\left(\frac{1}{x}\left(x-1\right)\right)^5$

$\left(2x^{2}y\right)\left(y^{3}\right)$