$\int\frac{x^4}{\left(x^5-7\right)^5}dx$

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

$x^2-yx^2+\frac{dx}{dy}\left(y^2+xy^2\right)$

$\int\frac{x^2-3x+1}{x-1}dx$

$\int6x^2cos\left(-x\right)dx$

$-2g^2-24g=-26$

$\frac{1}{\left(x+7\right)\left(2x+1\right)\left(2x-1\right)}$