$10\cdot\left(2^3+7-6\right)$

$\frac{d^2y}{dx^2}\:y=-2x^6+5$

$3\left(\cos\left(3x\right)-\cos\left(x\right)\right)=0$

$16n^2+24n+9$

$\frac{dy}{dx}=\frac{x}{y}+2\frac{y}{x}$

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

$\left(-4\right)-\left(+8\right)-\left(+18\right)-\left(-11\right)$