$\int\frac{5}{1+e^{-x}}dx$
$e=\text{sen}\theta.\cos\theta.\text{csc}\theta$
$\cot\left(x-y\right)=\frac{1}{\tan\left(x-y\right)}$
$\int_o^5\left(1-4\sqrt{x}\right)^2dx$
$24-4\cdot2$
$6\:\sin \theta+3=0$
$\int_{-4}^xdx$
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