Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "t3"   was replaced by   "t^3". 

Step  1  :

Equation at the end of step  1  :

  3t3 • t

Step  2  :

Multiplying exponential expressions :

 2.1    t³ multiplied by t¹ = t^{(3 + 1)} = t⁴

Final result :

  3t4