$\left(5a-6b^3\right)^2$

$\frac{dy}{dx}=y^2\left(4y-y^2\right)$

$u\:2\:-\:4u\:-\:60$

$4.1+3.1+2.1+1.1+0.1+-0.9+-19$

$\int\left(x^6\left(x^7-5\right)^9\right)dx$

$\frac{\sin\:\left(x\right)-\cos\:\left(x\right)+1}{\sin\:\left(x\right)-\cos\:\left(x\right)-1}$

$\frac{x^3+x^2-12}{x-2}$