$3x+1+\left(3y-1\right)\:y^'=0$

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

$3^4\cdot3^{-6}\cdot9^0$

$2x+5=x+2$

$2y\left(y+1\right)dx-ydy=0$

$\int_0^{\infty}\frac{2x}{\left(1+x^2\right)^2}dx$

$\left(-14\right)\left(5\right)\left(-4\right)\left(3\right)\left(-5\right)$