$6,53\:\cdot42$
$3y^2-5y-2$
$\left(a+\frac{1}{6}x^6\right)^3$
$\left(a-b\right)\left(a^5-b^5\right)$
$\frac{1}{2}sen\:2\pi x\:+\frac{1}{2}sen\:4\pi x=\pi xcos2\pi x$
$\sin^2\left(x\right).\sec^2\left(x\right)+\cos\left(x\right)^2$
$\frac{d}{dx}x^3+y^3-4xy=0$
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