$-24+\left(-19\right)-\left(-50\right)+150$

$\lim_{x\to-\infty}\left(\frac{2x+8}{x^2+2}\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\sec\left(x\right)\right)^{\cot\left(x\right)}$

$\left(a^2b^3-13y\right)\left(4x-13y\right)$

$2x^2-13x-70$

$\int5xedx$

$\left(\frac{4m^5n^6}{3m^7n^6}\right)$