$\sin\left(-3x\right)=0.5\sqrt{2}$
$-20x=-80$
$25x^4-3^6$
$\int_0^{\frac{1}{\sqrt{x}}}2xsen^{-1}\left(x^2\right)dx$
$\frac{x^3-x^2-8x+12}{x+2}$
$\sqrt{\left(1-\frac{x^2}{4}\right)}$
$\left(-\:5\right)\:-\:\left(+4\right)\::\:\left[\:\left(-\:2\right)\:-\:\left(-\:3\right)\:\right]\:$
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