$-18x^2-6x$

$\left(\frac{1}{2}ab^2-\frac{1}{4}ab^2\right)$

$\left(\left(a-bp\right)e^{at0-at}+bp\right)^2$

$\frac{1-\sqrt{2x}}{3}\cdot\frac{1-\sqrt{2x}}{1-\sqrt{2x}}$

$\int\left(t^2+1\right)^22t\:dt$

$\frac{4x^2-20x-23}{x+6}$

$\int_2^2\left(\frac{16}{x^2+4}\right)dx$