Division in $\mathbb {Z}$/p$\mathbb {Z}$ or in $\mathbb {Z}$/p$\mathbb {Z}$[x] : /

/ divides two integers in $\mathbb {Z}$/p$\mathbb {Z}$ or two polynomials A and B in $\mathbb {Z}$/p$\mathbb {Z}$[x].
For polynomials, the result is the irreducible representant of the fraction ${\frac{{A}}{{B}}}$ in $\mathbb {Z}$/p$\mathbb {Z}$[x].
For integers in $\mathbb {Z}$/p$\mathbb {Z}$, input :

5%13/2% 13

Since 2 is invertible in Z/13$\mathbb {Z}$, we get the output :

-4%13

For polynomials with coefficients in $\mathbb {Z}$/p$\mathbb {Z}$, input :

(2*x^2+5)%13/(5*x^2+2*x-3)%13

Output :

((6%13)*x+1%13)/((2%13)*x+2%13)