42. $x^2y'' - 3xy' + 4y = x^2 \ln(x)$, $y_h = c_1x^2 + c_2x^2 \ln(x)$
43. $x^2y'' - 6xy' + 10y = 4x^3 \ln(x)$, $y_h = c_1x^2 + c_2x^5$
44. $x^2y'' + 4xy' + 2y = 4\ln(x)$, $y_h = c_1x^{-1} + c_2x^{-2}$
45. $xy'' - 2y' = \ln(x)$, $y_h = c_1 + c_2x^3$
46. $x^2y'' - 2y = 18x^2 \ln(x)$, $y_h = c_1x^{-1} + c_2x^2$
47. $xy'' - y' = x^2e^x$, $y_h = c_1 + c_2x^2$