$20xg^2+20g^2$

$\int e^{-6x}\cos\left(2x\right)dx$

$\int_0^{\frac{\pi}{2}}\left(16x^2sin\left(x\right)\right)dx$

$\frac{d}{dx}\left(x^x\right)\left(x+2\right)^3\left(5x-9\right)^4$

$\left(a^3-81\right)\left(-27-c^3\right)$

$8\:-5w\:=-37$

$\int\frac{1}{2}x\:tan\left(x\right)dx$