$3\left(1-x\right)\ge2-\frac{x}{2}$
$sen^2x-sen^2\left(90-x\right)$
$\sqrt{ax^2}$
$7.59-9$
$\frac{d^2}{dx^2}\left(4x-3\right)^3$
$\int6e^x\left(e^x+5\right)dx$
$530+170-\left(124+75\right)$
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