$\left(x+-6\right)\left(x+5\right)+\left(x+2\right)\left(x-1\right)$
$-45+22-14+9-75$
$1+6+12+8$
$36x^2+120x+160$
$f\left(x\right)=\sen^{2}\left(x\right)+\tan^{2}\left(x\right)+\cos^{2}\left(x\right)$
$50x^2-32$
$\int\left(-\sqrt{3-x}\right)dx$
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