$4\ln\left(x+2\right)+6\ln\left(x+3\right)-\ln\left(x+1\right)-6\ln\left(x+2\right)$

$449.01-108.39$

$9y^{2}-y=0$

$\frac{\left(42a^2b^4-6a^3b^3+18a^3b^2\right)}{\left(6a^2b^2\right)}$

$3\sin^2x-\sin x-4$

$3.2\sqrt{18}$

$\frac{6c^9\left(-3\right)^6d^8}{2c^3\left(-3\right)^3d^2}$