$sin\left(\frac{5\pi}{3}+x\right)$
$-6n=-8n-2$
$\sqrt{64x^4y^{22^2}}$
$2x-3<-7+x$
$\int e^{-3x}sen3xdx$
$20x^2+23x-21$
$\frac{w}{-13}+5=2$
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