$\frac{dy}{dx}\left(\frac{3x+9}{5x-1}\right)$

$\int\left(x+2\right)\left(x-1\right)dx$

$3x+12=x+16$

$\int\:-\frac{9x^2-34x+27}{\left(x-2\right)^3}dx$

$\left(-x^{4}-3x^{3}+2x^{2}-14x+1\right):\left(x^{2}+4x-1\right)$

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

$b2+3b+7$