$\left(x-1\right)\frac{dy}{dx}+y=x^2-1$

$\left(4x-7\right)^2+2\left(4x-7\right)+1$

$7.3^2$

$z=\left(x+c\right)\left(y+d\right)$

$\int\left(-3x^{-5}\right)dx$

$\lim_{x\to\infty}\left(\left(x-1\right)\left(2x+3\right)^{-1}\right)$

$\left(3m^3+5m^2\right).\left(2-3m\right)$