$3d^4-363d^2$

$\left(-\frac{1}{6}\right)sec^3\left(\frac{4}{3}x\right)$

$5.6\left(5-3\right)$

$\cos\left(4x\right)\sin\left(5x\right)-\sin\left(4x\right)\cos\left(5x\right)$

$\frac{z^5\:y^6}{z^7\:y}$

$2\left(6\right)\left(5\right)+2\left(3\right)\left(5\right)+\left(6\right)\left(3\right)$

$\sin\left(x\right)=0.25$