Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "*-3" was replaced by "*(-3)".

Step  1  :

Equation at the end of step  1  :

  (0 -  (328 • -3)) -  7

Step  2  :

Multiplying exponents :

 2.1    3²⁸  multiplied by  3¹   = 3^{(28 + 1)} = 3²⁹

Equation at the end of step  2  :

  (0 -   -329) -  7

Step  3  :

Final result :

  3 - 7