What is the inverse of X modulo $1 + X + X^2 + X^3 + X^4$?

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What is the inverse of X modulo $1 + X + X^2 + X^3 + X^4$? Is there any open softwares to calculate such things easily?

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Hint: $1+X+X^2+X^3+X^4=1+X(1+X+X^2+X^3)$.