$\left(6m+7n\right)\left(5m+2n\right)$
$3x+2x-x+2^2$
$8y^2+64y+1024$
$\int\frac{\cos^3\left(x\right)}{1-\sin^2\left(x\right)}dx$
$3x^2+2x-1=0$
$\left(-8r-6d\right)\:\left(8r-6d\right)$
$15x^2-19x-20$
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