$\frac{3x}{x^3+2x^2-11x-12}$

$logaloga2$

$\frac{1-\sin^2\left(x\right)+\cos\left(x\right)}{\sin\left(x\right)\left(1+\cos\left(x\right)\right)}\:=cot\left(x\right)$

$\int\frac{\sin\sqrt{x}}{\sqrt{y}}dx$

$f'\left(x\right)=x+\left(\frac{1}{2}\right)sen\left(2x\right)$

$\:\:\:\:\:\frac{k^5}{k^8}=\:\:\:\:\:\:\:\:\:\:$

$\int\frac{cos^3\left(2x\right)}{sen^5\left(2x\right)}dx$