$\left(\frac{1}{3}\right)a\left(x-3y\right)$
$\int\:\left(5z-1\right)\sqrt{z+2}dz$
$20x^2+31x+12$
$4\:senx\:-2=0$
$t2-7t+49$
$\int\sin5x\:sin\:x\:dx$
$\frac{d}{dx}\sqrt{x+4}$
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