$\left(3x+5y\left(3x-5y\right)$
$2sen3xcosx+\left(senx-cosx\right)^2$
$f\left(x\right)=\:4sin^4\left(\frac{x}{5}-\frac{\pi}{6}\right)$
$4x+13>x+22$
$\frac{d}{dx}xy+x=6$
$2x^3+4x^2-42x$
$-47=g-52$
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