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

$\left(x^2-8x+6\right)\left(x-2\right)$

$\left(x^{5}+5\right)\left(x^{10}-5x^{5}+25\right)-125$

$\left(-4\right)^2\cdot\left(-4\right)^5$

$-2\left(1\right)^3$

$\left(4p+3q\right)\left(4p-3q\right)\:\cdot$

$\lim_{x\to\infty}\left(\frac{\left(5x-4\right)\left(4x+3\right)}{\left(x-1\right)\left(x+4\right)}\right)$