Q#$2)$ Solve the following second$-$order linear differential equations, using Cauchy$-$Euler method

$x^2{y}^{\text{'}\text{'}}-5x{y}^{\text{'}}+9y=18cos(3lnx)$

$x^2{y}^{\text{'}\text{'}}+9x{y}^{\text{'}}+25y=\frac{27}{x^4}$