Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x6"   was replaced by   "x^6". 

Step  1  :

Multiplying exponential expressions :

 1.1    x²¹⁶ multiplied by x⁶³ = x^{(216 + 63)} = x²⁷⁹

Final result :

  x279