GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
#example of metabelian computation
1
meta
5
1
1
{a, b}
{a^625, b^625, [b, a, b], [b, a, a, a, a] = [b, a]^5}
0
8
14 #set metabelian flag
0
6 #next class
6
6
6
6
6
6
6
6
6
6
6
6
2
META
0