Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x8"   was replaced by   "x^8". 

Step  1  :

Multiplying exponential expressions :

 1.1    x²¹⁸ multiplied by x⁸¹ = x^{(218 + 81)} = x²⁹⁹

Final result :

  x299