$\left(6x\right)+\left(10y\right)+4z+\left(-10y\right)$

$5f^2\left(-7\right)$

$secxcos\left(2x\right)$

$\frac{d}{dx}\cot\left(4x^3\right)$

$2\sin\left(0.4\pi t\right)\cos\left(2\pi t\right)$

$16x^6-4x^3+12x^2$

$\lim_{x\to0}\left(\frac{\left(1+x\right)^4-1}{x}\right)$