Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x2"   was replaced by   "x^2". 

Step  1  :

Multiplying exponential expressions :

 1.1    x² multiplied by x² = x^{(2 + 2)} = x⁴

Final result :

  x4