Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x5"   was replaced by   "x^5". 

Step  1  :

Multiplying exponential expressions :

 1.1    x²¹⁵ multiplied by x⁵⁴ = x^{(215 + 54)} = x²⁶⁹

Final result :

  x269