FullForm - Prints the full form of the expression with no special syntax¶

$ wo 'FullForm[x+y+z]'
Plus[x, y, z]

$ wo 'FullForm[x y z]'
Times[x, y, z]

$ wo 'FullForm[5*x]'
Times[5, x]

$ wo 'FullForm[x^n]'
Power[x, n]

$ wo 'FullForm[{a,b,c}]'
List[a, b, c]

$ wo 'FullForm[a->b]'
Rule[a, b]

$ wo 'FullForm[a=b]'
b

$ wo 'FullForm[a b + c]'
Plus[Times[a, b], c]

$ wo 'FullForm[a (b + c)]'
Times[a, Plus[b, c]]