Answer:
x + 3 + x
Explanation:
3x :
This is a product of two terms, where x is any variable.
3 + x :
This is sum of two terms,where x is any variable.
x^3 :
This expresses x to the power of three. It can also be written as (x times x times x ). Thus it is the product of three terms, where x is any variable.
x + 3 + x :
This is the sum of three terms, where x is any variable.
Thus answer is x + 3 + x