$\left(4y^3+2y\right)\frac{dy}{dx}=2+4x$

$\lim_{x\to0}\left(\frac{\sqrt{4-x^2}}{x-2}\right)$

$\left(y-\frac{3}{5}\right).\left(y+\frac{3}{5}\right)$

$12x^2+6x+4$

$\lim_{x\to0}8x\left(tan\left(\frac{3}{x}\right)\right)$

$\lim_{c\to1}\left(\frac{x\left(c^n-1\right)}{c-1}\right)$

$\left(2x^2-4y^5\right)^2$