$\frac{dy}{dx}=2x+6$

$\lim_{x\to\infty}\left(x\:\ln\left(\frac{x}{x+2}\right)\right)$

$\:\left(5x^2-8\right)^2$

$y'\left(t\right)\:=\:\left(t+1\right)\left(y\left(t\right)^2-1\right)$

$\left(b.a\right).\left(b.c\right).\left(c.b\right).\left(a.c\right).\left(c.a\right)$

$y'+2xy-y=4x-2$

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