$\left(-1+5\right)\left(3+1\right)$

$\lim_{x\to\infty}\left(\frac{2x^2}{x+4}\right)$

$\left(m^3n-6y\right)\left(m^3n+6y\right)$

$\sqrt{1.4142135623730951+\sqrt{5-3\cdot2.449489742783178-1\cdot\sqrt{2}+\sqrt{8+2\sqrt{12}}}}$

$\frac{8x^3+6x^2-3x+1}{2x^2-x+2}$

$\left(4x^2y+9m^3\right)^2$

$\int\left(6x-4\right)^3dx$