$\frac{dy}{dx}\left(2^{x^2}-2^{y^2}=2x^2y^2\right)$

$3+3x-1$

$\lim_{n\to\infty}\left(\frac{\left(n\right)^2\left(ln\left(n\right)\right)^2}{\left(n+1\right)^2\left(ln\left(n+1\right)\right)^2}\right)$

$\frac{\left(x^3+3x^2+2x\right)}{\left(x^2+x\right)}+\frac{\left(3x-x^2-2\right)}{\left(x-1\right)}$

$-6k+6-k_{-8}$

$\frac{2ctg\left(n\right)}{1+ctg^2\left(n\right)}-2sen\left(n\right)\cdot cos\left(n\right)$

$36x^2+48x+20$