$\frac{1}{csc\left(x\right)+1}+\frac{1}{csc-1}=2sec\left(x\right)\cdot\tan\left(x\right)$

$5a^2b^3-5a^3b^2+2b^2a^3$

$\lim_{x\to\infty}\frac{\sqrt{2+x^2}}{2}$

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

$\frac{2\frac{1}{2}+3}{\sqrt[2]{1-2\frac{1}{2}}}$

$-6m+4=4-6m$

$82z+25z$