$\frac{dy}{dx}=x+2xy+cosy+y^2$

$\lim_{x\to\infty}\left(\frac{6x^2+7x+2}{x+3}\right)$

$\int_b^0e^xdx$

$r^2-20r+2$

$\int\left(9x^{-8}\right)dx$

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

$\left(3x-y\right)\left(3x+y\right)\left(9x^2+z^2\right)$