$\frac{dy}{dx}\left(2e^{-x}+e^{3x}\right)$

$\left(5x+14\right)^4-\left(5x-14\right)^4$

$\int\left(\frac{7\arctan\left(x\right)}{\:1+x^2}\right)dx$

$x^2+18x+169$

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

$\sqrt[3]{8b^3}$

$\frac{1}{2}a-\frac{8}{4}a$