$\left(x+10\right)\left(x-13\right)$

$\left[\left(x^3+x\right)+\left(x^2-1\right)\right]\left[\left(x^3+x\right)-\left(x^2-1\right)\right]$

$\frac{s}{6}+12\ge9$

$-43+-27+1$

$10^{11}-10^3$

$3x^2+9x+6y^2+x+2y$

$\frac{dy}{dx}=\left(\cos\left(y\right)\right)^2\:\sin\left(x\right)$