$\frac{x^2-1}{x^2+3x+2}=2$

$\frac{2x+3y}{2x+3y}$

$\left(-\frac{6x^{5}y^{4}}{c^{4}}\right)^{5}$

$30+37.45$

$\int\frac{1}{\left(5x-1\right)\left(\ln\left(5x-1\right)\right)}dx$

$\log\left(4\right)+\log\left(5x\right)=2$

$\lim_{x\to\infty}\left(\frac{2x^2-x+1}{3x+5}\right)$