$\left(6x^3y^4\right)^2$
$x^2-22x-121$
$\frac{1-\cos\left(y\right)}{1+\sec\left(y\right)}$
$\frac{d}{dx}\left(xsen\left(xy\right)+2x\:y^{-\frac{2}{3}}\:=xln\left(xy\right)\:\right)$
$2x+11=3$
$\frac{sin^2x}{1}-\frac{sin^2x}{cos^2x}$
$-x-5\ge20$
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