MHB Difficult first order linear differential equation

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The differential equation y'=(x^3-y^3)/(x-y) presents significant complexity, with solutions involving Hermite functions and hypergeometric functions. A user reported a solution from a differential equation solver that simplifies to a polynomial expression involving constants and powers of x. The discussion highlights the challenges in solving such equations and the intricate nature of the solutions. Participants are encouraged to share the context in which they encountered the problem and any methods they have attempted. The conversation emphasizes the need for clarity in tackling complicated first-order linear differential equations.
WMDhamnekar
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Hello, I want to solve the following differential equation. $y'=\dfrac{x^3-y^3}{x-y}$. How to solve it?
 
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Wolfram Development Platform (essentially Mathematica) gives a horrendous answer: extremely complicated with Hermite $H_n(x)$ functions and the hypergeometric $_1F_1$ function. In what context did this problem come up, and what have you tried?
 
Ackbach said:
Wolfram Development Platform (essentially Mathematica) gives a horrendous answer: extremely complicated with Hermite $H_n(x)$ functions and the hypergeometric $_1F_1$ function. In what context did this problem come up, and what have you tried?

I got the following answer from my differential equation solver.

\[y(x)=\frac{x^3}{6}(C_1(C_1+1)+3C_1+2)+\frac{x^5}{120}(C^3_1+C_1(74C_1+9)+31C_1+8)+C_1+C_1x+\frac{3C_1x^2}{2}+\frac{C_1x^4}{12}(C_1+4)+\mathcal{O}\]
 
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You can reduce the expression to this

y'=x^2 + x y + y^2
 

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