$\left(13a^2b^4-1-10ab^2\right)\left(13a^2b^4-1+10ab^2\right)$

$\frac{dy}{dx}=-x^3y^2=y^2$

$\frac{\left(2\sin\left(x\right)\cdot\cos\left(x\right)+1\right)}{\sin\left(x\right)\cdot\cos\left(x\right)+\cos\left(x\right)}$

$-5x-\left(x-y\right)$

$\left(3a-1\right)\cdot\left(3a+6\right)$

$\int\frac{-x-4}{6x^2-x-2}dx$

$\frac{\left(\sqrt[3]{1}-1\right)}{1-1}$