Answer with explanation:
The given expression which consist of Variables, constants and Operation addition, Subtraction , Multiplication and Indices is:

Variable means those representations through alphabets either capital or small whose value is not fixed.It varies.
So, number of variables in the expression are=x,y,and z
There are 5 distinct terms in the expression having operation between them is Addition and Subtraction whch contain variable along them that is, x, y,and z.
Numerical value of variable terms=5 which are
