Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "t7"   was replaced by   "t^7". 

Step  1  :

Equation at the end of step  1  :

  5t7 • t

Step  2  :

Multiplying exponential expressions :

 2.1    t⁷ multiplied by t¹ = t^{(7 + 1)} = t⁸

Final result :

  5t8