$\int\frac{5x^3+2x^2-40x-21}{x^2-9}dx$

$\left(3w\right)\left(w+4\right)\left(w-4\right)\left(x+x\right)$

$-6\left(8c-8\right)$

$\int\frac{x^3-7}{x+2}dx$

$\frac{d}{dx}5x^2+\frac{3}{x}$

$\left(-6x^{-2}y\right)\left(-3x^2y^{-1}\right)$

$\int\left(3x^3sin\left(4x^2\right)\right)dx$