$\:\left(-500\right):\:\left(+10\right)$

$\int_0^{\pi}\left(t\:sen\:3t\right)dt$

$\lim_{x\to0}\left(\frac{\ln\left(x\right)}{\frac{1}{4x}}\right)$

$\int\left(\sqrt[3]{1-2x^2}\right)\left(-4x\right)dx$

$u^4+6u^2+8$

$\left(m^3n^2+6m^4\right)^2$

$-\frac{x^2}{x^2\left(x^4+1+x^{-1}\right)}$