$\sin^4u-\cos^4u=\sin^2u-1$

$\left(y+x^2y\right)^4$

$\frac{1-\cos^2\left(y\right)}{2\sin\left(y\right)\cos\left(y\right)}=\tan\left(y\right)$

$2m^2-6n^2+5n^2+3m$

$\int\tan^{-1}\left(\sqrt{2x}\right)dx$

$\int\left(4x\cdot\cos\left(x^2\right)\right)dx$

$100+x+0.01x^2=700\:$