$\lim_{x\to\infty}\left(\frac{2-5x}{\sqrt{x^2+2}}\right)$

$\left(1+x\right)^{\frac{1}{3}}-1-\frac{x}{3}+\frac{x^2}{9}\le\:\frac{5}{8}x^3$

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

$\frac{135}{2}\left(2.6-5\right)$

$\left(\frac{m^2^{.-25}}{m-5}\right)$

$\int\:u\:\tan^2\left(u\right)\:du$

$14+a-26$