Многочлены объема для многогранников комбинаторного типа $n$-гранных призм в случаях $n=5,6,7$

We present an algorithm for an explicit construction of the canonical volume polynomials for polyhedra combinatorially isomorphic to an $n$-prism in the cases $n=5,6$ and $n=7$ and realize them in the case of some special values of edge lengths.