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

$-4\cdot\left(8-5\right)$

$\lim_{x\to9}\left(\frac{\left(x+9\right)}{\left(x-9\right)^{10}}\right)$

$\int_0^{\frac{1}{2}}\frac{1}{\sqrt{1-x^2}}dx$

$\frac{8x^4}{x^2}$

$\left(\sec e+\tan e\right)^2$

$\left(-63\right)+\left(-21\right)+\left(85\right)-\left(95\right)$