$\lim_{x\to4}\left(x^2+2x+3\right)\cdot\left(x+1\right)$

$\left(8m^2-6\right)\left(m^4-6\right)$

$\left(3m+n^2\right)-\left(5x^3\right)^2$

$55m^2n^3x+110m^2n^3x^2-220m^2y^3$

$\int\left(umg\right)dq$

$\lim_{x\to5}\left(\frac{x^2-25}{x^2-5}\right)$

$\left(-157\right)\left(-8\right)$