$13mx^3+7m^3x$

$-7-\left(-90\right)$

$\cos\left(x\right)\left(1-\cos\left(2x\right)\right)\sin\left(x\right)\sin\left(2x\right)$

$\frac{\left(w^3-9w\right)}{\left(w^3-6w^2-9w\right)}$

$130.82-0.180\left(48.835\right)$

$\frac{\tan\left(1\right)+\cos\left(1\right)}{\sin\left(1\right)}=\sec\left(1\right)+\cot\left(1\right)$

$-101-80+44$