Question

in using the rule of exponents x.x.x.x.x+y.y.y+z.z can be writen as x^5y^3z^2

Answer 1

they are still added though; btw u used the definition of integer exponent, not a rule
x^5+y^3+z^2

Answer 2

evaluate the expression (x^2y^3)^2 IF x=3 and y=2.
___________
y^3