$\left(5x\:-\:2\:z^4\right)\:\left(5x\:+\:2\:z^4\right)$

$\left(-1\right)\cdot4\left(-7\right)$

$\int e^x\left(1-2\sin^2\left(e^x\right)\right)dx$

$\frac{\left(4-x^2\right)}{3-\sqrt{x^2+5}}$

$\left(1.0v^3w^2\right)-\left(12.3v^3w^2\right)$

$\frac{dy}{dx}-y-xe^x=0$

$\left(n+12\left(n+12\right)\right)$