Which of the following is the general solution to the differential equation $\frac{dy}{dx}=9x^2{y}^2$?

Find the general solution of the differential equation: $\frac{dr}{d\theta }+r\sec \left(\theta \right)=\cos \left(\theta \right)$.

Consider the following differential equation: $x\frac{dy}{dx}-y=x^2\sin \left(x\right)$. Which of the following is the correct integrating factor to solve this equation?

Solve the differential equation $x^2{y}^{\text{'}\text{'}}+x{y}^{\text{'}}-y=\ln \left(x\right)$ using the method of variation of parameters. Which of the following is the general solution?

Find the solution to the differential equation $\frac{dy}{dx}=3y$ with the initial condition $y\left(0\right)=2$.

Solve the differential equation by separation of variables: $\frac{dy}{dx}=\frac{2y+5}{{8x+9}^2}$. Which of the following is the general solution?

Solve the differential equation $y^{\mathrm{\text{'}\text{'}}}+2y^{\mathrm{\text{'}}}=2x+9-e^{-2x}$ using the method of undetermined coefficients. Which of the following is a particular solution?

Solve the differential equation $\frac{dy}{dx}=2y$ by separation of variables. Which of the following is the general solution?

Which of the following is the general solution to the differential equation $y^{\mathrm{\text{'}\text{'}}}+y=5x\sin \left(x\right)$ using the method of undetermined coefficients?