$\frac{2x^2+11x+8}{x+4}$

$6x\left(6x-y\right)-2\left(-y-6\right)$

$x^2-15x+50=0$

$\int\frac{x^2+4x+2}{x^4-4x^2}dx$

$\int e^{7x}\left(\frac{e^{2x}}{9}+\frac{3}{e^{3x}}\right)dx$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{\cot^2\left(x\right)}{1-\sin\left(x\right)}\right)$

$\int_0^2e^{\sqrt{x}}dx$