$3.\:\log\left(x\right)=3$

$f\left(x\right)=\sqrt[4]{\left(x^2+9\right)^3}$

$3\left(1-4\right)^{-2}+9^{-1}$

$\frac{dy}{dx}=\frac{y}{x}+4x^2$

$\left(-5m+6\right)+\left(-m+5\right)-6$

$\frac{30x^{3}y^{5}}{12x^{6}y^{7}}$

$\int\left(\frac{\sin\left(x\right)\cos^3\left(x\right)}{1+\cos^2\left(x\right)}\right)dx$