$3\cdot\left(-\frac{1}{3}xy^2\right)^2\cdot2y$

$\sin^2x-1\sec^2x+1=\sin^2x$

$g\left(p\right)=3200-2\left(p-80\right)^2$

$\lim_{x\to\infty}\left(\sqrt[n]{n\cdot\log\left(n\right)}\right)$

$9y=\frac{\senx}{\cos x}$

$\lim_{x\to-\infty}\sqrt{2x^2+4}-\sqrt{5x^2-5}$

$a^2+a-1$