ambot
2a, 2a², 2a³, etc... are all terms. An expression contains two or more terms.
Yes, but you cannot combine them.Thus, 2x2 and 1/x can be added to give 2x2 + 1/xbut they cannot be combined into a single term.
Even 6 Point, Line, Incident, Congruent, Between and Plane Ya-ha