Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "r7"   was replaced by   "r^7". 

Step  1  :

Equation at the end of step  1  :

  2r215 • r7

Step  2  :

Multiplying exponential expressions :

 2.1    r²¹⁵ multiplied by r⁷ = r^{(215 + 7)} = r²²²

Final result :

  2r222