$\left(-4x^2y+5y^4z^2\right)$

$\lim_{x\to0}\left(\frac{sen4x+3tanx}{4x-tan2x}\right)$

$15.07+0.9-1.1$

$8\left(x-1\right)-3x\left(4-x\right)+6\left(x+2\right)-3$

$x^4+4x^3-x^2-20x-20$

$\int\frac{1}{x^2\sqrt{25x^2-49}}dx$

$-\left(x-2y\right)-\left(3x-\left(2y-z\right)\right)-\left(4x-\left(3y-2z\right)\right)$