$\frac{6x^2-15x+22}{\left(x+3\right)\left(x^2+2\right)^2}$

$\lim_{x\to5}\frac{x^3-9x}{x^2-3x}$

$\left(\left(2a-3b\right)^2+\left(3a-5b\right)^2\right)^2$

$\frac{dy}{dx}\left(5x+6y=xy\right)$

$\left(-32\right)\cdot\left(+3\right)$

$3a+2b+4^2$

$-2ab\cdot\left(a^{2}b-3ab^{3}\right)$