$20\cdot.2$
$-4m^2\:por\:-5mn^2p$
$x^2-4=4$
$\int\frac{5}{\sqrt{2}\sqrt{x}}dx$
$2\left(y\right)\cdot5$
$-7+2a>9$
$-9\left(\cos^2\left(x\right)\right)+\sin\left(x\right)+11=-\sin\left(x\right)+2$
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