$\int_0^a\left(e^{-xy}\right)dx$

$2\left(4c+5\right)$

$7.9\cdot5.84$

$\lim_{x\to0}\left(\frac{4e^{6-2x}-f''\left(x^2\right)}{f'\left(x\right)+1}\right)$

$\frac{x+2}{x^2-4}+\frac{3}{2x+4}=\frac{-x}{2}$

$\left(\frac{1}{5}x+\frac{3}{4}y\right)^2$

$\int\frac{3x^2}{\sqrt{5x^3+6}}dx$