Use the method for solving Bernoulli equations to solve the following differential equation. $$ \frac{\mathrm{dr}}{\mathrm{d} \theta)=\frac{\mathrm{r}^{2}+12 \mathrm{r} \theta^{3}}{3 \theta^{4}} $$ Ignoring lost solutions, if any, the general solution is $r=$ (Type an expression using $\thetas as the variable. CS.SD. 140