You have the following algebraic expression:
4x³ + 2x² - 3x + 1
In order to determine the number of term that the previues expression has, you consider that a term is a simple expression separated of anothers by minus or plus symbols. Furthermore, a term is the product of a coefficient by one or more variables. The variable can have exponent 0, which means that the term is a constant.
Thus, you can notice that tin the given expression there are four terms.