$40\:.\:-30$
$12m^3n^3\:-\:18\:m^2n^2\:-\:24m^4n^4\:$
$\left(121x^2-144m^2\right)$
$9b^2-6b+3$
$3\sin^2\left(x\right)+2\cos\left(x\right)=2$
$\int\left(\frac{1}{-cos\left(x\right)}\right)dx$
$9\cdot2\cdot\left(-1\right)$
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