Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x9"   was replaced by   "x^9". 

Step  1  :

Multiplying exponential expressions :

 1.1    x²¹⁹ multiplied by x⁹⁰ = x^{(219 + 90)} = x³⁰⁹

Final result :

  x309