$x^2-24x+9$

$\frac{3x+2}{6}-x=-\frac{2x+1}{3}$

$\frac{\tan\left(x\right)^2}{\sin\left(x\right)^2}-1$

$\left(a^{3}-2an^{4}\right)^{2}$

$\int_0^{\frac{x}{2}}\left(\frac{\left(sin\left(2x\right)\right)}{cos\left(x\right)+1}\right)dx$

$\int_0^{\pi}2t\sin\left(t\right)dt$

$\frac{3x^2-12}{x+2}$