$\left(b^5+9\right)\left(a^3-2\right)$

$\left(-3a^2+2\right).\left(a^2+4\right)$

$\frac{d^3}{dx^3}\left(cosx\right)$

$2-7<0$

$\int\frac{1}{\left(x^2\right)\left(\sqrt{16\cdot x^2-9}\right)}$

$\left(9x^4-4x^2+8x+12\right)+\left(x^3-7x^2+5x\right)\:$

$f\left(x\right)=\left(5x^3\right)^3$