$83,9+75,64$

$\sin\left(\sqrt{x}\right).\cos\left(\frac{1}{x}\right)$

$\:\left(raiz\left(x^2+3x\right)\right)^3$

$\:4c-2c-\left(4c+2c\right)$

$\int_0^{2\cdot\pi}\left(\frac{\sin\left(x\right)}{2\cdot\pi}\right)dx$

$-500+100-300-400$

$\left(12a+2z\right)\left(12a-2z\right)$