$\lim_{x\to60}\left(\sin\left(2x\right)\sin\left(x\right)-\cos\left(x\right)\right)$

$\frac{2x^2+5x-3}{x+3}$

$\sin\left(2x\right)\cos\left(x\right)+2\sin^3\left(x\right)=2\sin\left(x\right)$

$30x^4y^6-5x^2y^5+25x^3y^4$

$\frac{a^{10}b^6}{a^6b^{10}}$

$\frac{-x^{4}+4x^{3}+12x^{2}-8}{x-6}$