$\int a\left(x\right)^{a-1}dx$
$-7.8+6.2$
$\frac{8\left(\tan\left(x\right)-cot\left(x\right)\right)}{tan^2\left(x\right)-cot^2\left(x\right)}$
$sen\:a\cdot\:cos\:a=1$
$\frac{x+2}{1}=\frac{3}{x-1}$
$e^{2x-1}=5$
$121-22b+b^2$
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