$3e+5e+e$

$\lim_{x\to\infty}\left(\frac{7\left(x+3\right)\left(x-5\right)}{\left|x-5\right|\left(3x-7\right)}\right)$

$\int\left(8x-6\right)e^{-2x}dx$

$\lim_{x\to2}\left(\frac{x-2}{cos\frac{\pi}{x}}\right)$

$\left(4x+3y+2z\right)^2$

$\left(\frac{1}{3}ab^3+4\right)\left(\frac{1}{3}ab^3+4\right)$

$\frac{5x-2}{4+3x}\ge-2$