$\left(5x-9y\right)\left(2x^2+7y\right)$
$0\cdot\left(-10\right)$
$3d^2-7d+4$
$\int sen^47\:x\:dx$
$2sin^2x=3cos^2x$
$-1729\cdot1$
$\frac{-x^2+2x+3}{2x-3}$
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