$4a^2-4ay+y^2$

$\frac{b^{24}}{b^{11}}$

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

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

$\frac{t-3}{t^2+9}.\frac{t+3}{t^2-9}$

$\frac{9x-20}{2x+6}\:-\:\frac{6x-13}{x^2-x-6}$

$-\frac{3}{2}\cdot0-1$