Problem $3$:

Find the general solution.

dy$/$dx$+(\frac{4}{x})=x^4$

Problems $4,5$: Find a general solution. Check your answers by substitution. $y$ is $y(x).$

$4.y^{\text{'}\text{'}}+(4)y^{\text{'}}+(4{}^2)y=0$

$5.10y^{\text{'}\text{'}}-7y^{\text{'}}+1\mathrm{.}2y=0$