$\int7ln\left(x^2-x+2\right)dx$

$\lim_{x\to\infty}\ln\left(\frac{3\cdot x^4-8}{2+x^2}\right)$

$\left|2x+3\right|4-2x$

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

$\left\{\left[-7+\left(3+2\right)-\left(-2\right)\right]+\left[\left(-3\right)-\left(+8-8\right)+\left(-10\right)\right]\right\}$

$\left(-2x\right)\left(-2x\right)\left(-2x\right)$

$6-\frac{7x}{2}$