$\sin\left(e\right)\sec\left(e\right)=\tan\left(e\right)$

$sin\left(3x\right)=0.3$

$\frac{1}{\sin\left(x\right)\cdot\cos\left(x\right)}-\cot\left(x\right)=\tan\left(x\right)$

$2x+3y-4z=10$

$\frac{1}{2}m^2-n^2\:^3$

$52+6^2$

$x^4-2x^3+1$