Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x4"   was replaced by   "x^4". 

Step  1  :

Equation at the end of step  1  :

  5x221 • x4

Step  2  :

Multiplying exponential expressions :

 2.1    x²²¹ multiplied by x⁴ = x^{(221 + 4)} = x²²⁵

Final result :

  5x225