$51\cdot66$

$\left[\left(2m^3\right)+\left(m^3-n\right)\right]\left[\left(2m^3\right)-\left(m^3-n\right)\right]$

$2x-45>-2x-5$

$\int4x^8+10x^3-2x^2-8x+3\:dx$

$\left(1+y\right)dx+\frac{dy}{x^2-2x}=0$

$\lim_{x\to\infty}\left(\frac{\sqrt{3x^4+5x^2}}{x^2-1}\right)$

$\left(s^2+w^4\right)\left(s^2-w^4\right)$