For e.g. 4x2+3, 7y2-2y+3, etc.
The combination of variables and constants when take part in the formation of mathematical expression, then such an expression is known as Algebraic Expression.
Terms of an expressions:
Terms are added to form expression.
Consider the first expression above, the terms are (4x2) and (3).
Now consider the send expression above, which can be written as
7y2 +(-2y) + 3
therefore, the terms of the expression are (7y2), (-2y) and (3). Note, the minus sign (-) is included in the term.