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

$\int\left(x+1\right)\left(3x+2\right)dx$

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

$\left(a^2-4\right)\left(a^2+6\right)$

$buym0zuy$

$\lim\:_{x\to\:\frac{-\pi\:}{2}}\left(cosx\cdot\:\:\:sec5x\right)$

$\lim_{x\to3}\left(\frac{1-\cos\left(x-3\right)}{x^2-9}\right)$