-- -*- M2-comint -*- hash: 9874146029743627242

i1 : G = gc(a..f, 3)

o1 = Grassmann-Cayley Algebra generated by 1-extensors a..f

o1 : GCAlgebra

i2 : lab = (a*b)_G

o2 = a*b

o2 : GCExpression

i3 : lcd = (c*d)_G;

i4 : lef = (e*f)_G;

i5 : lab ^ lcd ^ lef

o5 = -2*[bcd]*[aef]+2*[bef]*[acd]

o5 : GCExpression

i6 : 
