$\lim_{x\to0}\left(\frac{cos\left(cos\left(x\right)\right)-1}{2x^2}\right)$

$-3-\frac{1}{7}t=-11$

$\int\cot^4\frac{1}{2}xdx$

$8m-3n^2m-4n\left(3-2mn\right)-11$

$\int_1^{\infty}\left(\frac{2x^2+5x+14}{x\left(2x+5\right)}\right)dx$

$9a-b-2a-10b$

$\int\left(x+1\right)^{\frac{-1}{2}}dx$