SECOND-ORDER LINEAR DIFFERENTIAL EQUATION IN ITS EXACT FORM - Theoretical and Computational Research in the 21st Century - page 149

7.3 CONCLUSION
In this work, we have found a compact form for a second-order linear
differential equation such that its solution can be derived after two con-
secutive integrations. This form follows directly by just renaming their
coefficients, and is independent of any requirement on such coefficients.
That is, the expression posses all generality.
KEYWORDS
Second-order linear differential equation
Variation of parameters method
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4. López-Bonilla, J.; Yaljá Montiel, J.; and Zaldívar, A.; Factor integrante para una arbi-
traria ecuación diferencial lineal de 2do. orden. Bol. Soc. Cub. Mat. Comp. 2010, 8(1),
35-39.