$\left(5y-4\right)\left(2y+3\right)$

$\frac{16x^4-3y^4}{4x^2-6y^2}$

$\lim_{x\to0}\frac{7x^2+x}{x}$

$2\ln\left(3x\right)-3\ln\left(y\right)$

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

$\left(2x+y+2\right)\left(2x+y-2\right)$

$\int\left(\frac{1}{\sqrt{\cos\left(y\right)\left(1-\sin\left(x\right)\right)}}\right)dy$