$27=15+n$

$\frac{\left(3x^4+4x^3-2x^2+1\right)}{\left(x+2\right)}$

$\int e^{-.05t}dt$

$\frac{4\sec^2\left(x\right)-4}{sec\left(x\right)-1}$

$3-\left(5-8\right)-\left(11-4\right)+\left(13-9\right)$

$\lim_{x\to1}\left(\frac{x^3-1}{\ln\left(x\right)}\right)$

$\int_{1.5}^3\left(\frac{1}{13}\cdot x\cdot y^2\right)dy$