$256y^2-1200y$

$\int\:\:x^2\left(x^3+7\right)dx$

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

$\lim_{x\to0}\:\frac{\left(tan\left(sin\left(ax\right)\right)\right)}{sin\left(bx\right)}$

$-8x+3>19$

$\lim_{\theta\:\to0}\left(\cos\left(2\theta\:\right)\right)^{\frac{1}{\theta\:^2}}$

$\frac{\sin\left(x\right)}{1-\cos\left(x\right)}+\frac{\sin\left(x\right)}{1+\cos\left(x\right)}=2\sin\left(x\right)$