$\lim_{x\to0}\left(\frac{x^5-4x^4}{2x^3-4x^2}\right)$

$2>-2+2x$

$\left(\frac{2n^6w^3}{5n^5w^2}\right)^3$

$\left(5m^3v^2-4\right)\left(5m^3v^2+7\right)$

$7+3+11-\left(8-5-3+16\right)-42-4+7$

$169b^{\left(4\right)}+200b^{\left(2\right)}+144+112b-112b$

$4cos^2\left(x\right)-cos\left(x\right)-2$