$cos^2x-sin^2x=1$

$x^3-3x^2+4x-12$

$\int\frac{4x^3}{x}dx$

$\left(-7\:\right)\:\left(+7\right)\:\left(+15\:\right)\:\left(-3\:\right)\:\left(-6\:\right)\:\left(-8\:\right)\:$

$55x^2n^3x+110m^2n^3x^2-220m^2y^3$

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

$\int e^z\cos\left(z\right)dz$