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fricas
fm:=FreeMonoid(OVAR [e1,e2])

\label{eq1}\hbox{\axiomType{FreeMonoid}\ } (\hbox{\axiomType{OrderedVariableList}\ } ([ e 1, e 2 ]))(1)
Type: Type
fricas
EM:=Expression(fm)

\label{eq2}\hbox{\axiomType{Expression}\ } (\hbox{\axiomType{FreeMonoid}\ } (\hbox{\axiomType{OrderedVariableList}\ } ([ e 1, e 2 ])))(2)
Type: Type
fricas
x1:=e1::Symbol::EM

\label{eq3}e 1(3)
Type: Expression(FreeMonoid?(OrderedVariableList([e1,e2])))
fricas
x2:=e2::Symbol::EM

\label{eq4}e 2(4)
Type: Expression(FreeMonoid?(OrderedVariableList([e1,e2])))
fricas
p:=operator('p)

\label{eq5}p(5)
fricas
p(x1)

\label{eq6}p \left({e 1}\right)(6)
Type: Expression(FreeMonoid?(OrderedVariableList([e1,e2])))
fricas
x1*x2
Internal Error The function * with signature hashcode is missing from domain Expression(FreeMonoid (OrderedVariableList (e1 e2)))




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