$\int-7x^2\sqrt{9-x^2}dx$

$\lim_{x\to0}\left(\frac{2sin-0.1}{-0.1}\right)$

$\int\left(\left(2x-6\right)\cdot sen\left(2x^2-12x+16\right)\right)$

$\left(3m^2-5m-6\right)\left(2m^2+8m-7\right)$

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

$\lim_{x\to0}\left(\frac{e^x-\left(1-x\right)}{x}\right)$

$\frac{x^3+3x^2-2x+8}{x+2}$