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I have read, from the question:

Irreducibility of polynomials in two variables, that all polynomials $f(x)-g(y)$, where $f, g$ are indecomposable polynomials, and there are no $a, b$ such that $g(ax+b)=f(x)$, are irreducible, unless the degrees of $f$ and $g$ are $$7, 11, 13, 15, 21,\ \ \text{or} \ \ 31$$

Is there an example of the exceptional case in degree $7$, with the factorization?

I have read, from the question  Irreducibility of polynomials in two variables, that all polynomials $f(x)-g(y)$, where $f, g$ are indecomposable polynomials, and there are no $a, b$ such that $g(ax+b)=f(x)$, are irreducible, unless the degrees of $f$ and $g$ are $$7, 11, 13, 15, 21,\ \ \text{or} \ \ 31$$

Is there an example of the exceptional case in degree $7$, with the factorization?

I have read, from the question:

Irreducibility of polynomials in two variables, that all polynomials $f(x)-g(y)$, where $f, g$ are indecomposable polynomials, and there are no $a, b$ such that $g(ax+b)=f(x)$, are irreducible, unless the degrees of $f$ and $g$ are $$7, 11, 13, 15, 21,\ \ \text{or} \ \ 31$$

Is there an example of the exceptional case in degree $7$, with the factorization?

I have read, from the question:

Irreducibility of polynomials in two variables, that all polynomials $f(x)-g(y)$, where $f, g$ are indecomposable polynomials, and there are no $a, b$ such that $g(ax+b)=f(x)$, are irreducible, unless the degrees of $f$ and $g$ are $$7, 11, 13, 15, 21,\ \ \text{or} \ \ 31$$

Is there an example of the exceptional case in degree $7$, with the factorization?

I have read, from the question:  Irreducibility of polynomials in two variables, that all polynomials f(x)-g(y), where f, g are indecomposable polynomials, and there are no a, b such that g(ax+b)=f(x), are irreducible, unless the degrees of f and g are 7, 11, 13, 15, 21, or 31. Is there an example of the exceptional case in degree 7, with the factorization?

I have read, from the question: 

Irreducibility of polynomials in two variables, that all polynomials $f(x)-g(y)$, where $f, g$ are indecomposable polynomials, and there are no $a, b$ such that $g(ax+b)=f(x)$, are irreducible, unless the degrees of $f$ and $g$ are $$7, 11, 13, 15, 21,\ \ \text{or} \ \ 31$$

Is there an example of the exceptional case in degree $7$, with the factorization?