$\left(\frac{3x^{-4}}{r^4}\right)^2$
$19\sqrt{2}+\sqrt{2}-20\sqrt{2}$
$\int e^{4x}sen\left(x\right)\:dx$
$192.0911\cdot816,47$
$3m+2m-5n+4m$
$4x^2-8x-1=0$
$sinx\:+\:2\:=\:2sinx\:+\:3$
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