Is the expression x3•x3•x3 equivalent to x3•3•3? why or why not? explain your reasoning.

It is not because when numbers have an exponent and are multiplied, the exponents are added.
For example:
 ×  ×  = 
When a number with an exponent is multiplied with a whole number, the coefficients are multiplied. In this case  has an imaginary 1 being multiplied to it, so 1 will be multiplied to the other numbers.
 × 3 × 3 =  
Therefore, the expressions are not the same because the second equation does not have other variables being multiplied to it.

The answer would be 315 because you need to subtract