$-5m^2+15m$
$2senxcosx-sen^2x+cos^2x$
$210d^2-63d$
$\frac{x^2-2x^4+1}{x+1}$
$\int\:x\left(x^2+1\right)^2\:dx$
$\int\frac{3tan\theta\:\:-4cos^2\theta\:\:\:}{cos\theta\:}d\theta\:$
$\frac{\left(2x^2\:+4x-2\right)}{2}$
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