$\int\frac{\left(2x+18\right)}{x\left(x^2+9\right)}dx$

$\frac{\left(5-2i\right)+\left(1+3i\right)}{\left(1+i\right)-\left(2-4i\right)}$

$\frac{d}{dx}\left(50+90\ln\left(8x+4\right)\right)$

$\frac{dy}{dx}=\cos^{-1}\left(\sqrt{x}\right)$

$sin\left(1.9656\right)\:,\:\left[0\:,\:\frac{\pi}{2}\right]$

$\left(5a^2b+5a^2b+7b\right)+\left(2a^2b-3ab^2+4b\right)$

$\left(3x+4\right)\left(x^{-2}\right)$