$\frac{\left(1+sin\left(x\right)\right)\left(1-sin\left(x\right)\right)}{cos\left(x\right)}=cos\left(x\right)$

$-5+-4+-1+8+-2+-7$

$4\left(3+5\right)-\left(-5-6\right)+3\left(-4\right)$

$\lim_{x\to0}\left(\frac{x-2sen\left(x\right)}{tan\left(x\right)}\right)$

$\cot\left(x\right)=\frac{2\sqrt{14}}{13}$

$\sqrt[3]{-64}+2^4-\left(-3\right)^4-\left(\sqrt[3]{-27}\right)+\sqrt{256}$

$ax^2+3ax^2-10ax^2+5a^2$