$\lim_{x\to0}\left(1+x-sen\left(x\right)\right)^{\frac{1}{x^3}}$

$-\frac{1}{4}\left(20m+8y-32z\right)$

$\int_{-1}^{\sqrt{3}}\frac{x^{2}}{\sqrt{4-x^{2}}}dx$

$\int\cot\left(5x\right)^3dx$

$\:\left(5x+1\right)x\left(5x-1\right)$

$12a^2-36a+27$

$3\sqrt{50x^3}\sqrt{18x^3}-2\sqrt{8x^3}$