Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "y4"   was replaced by   "y^4". 

Step  1  :

Multiplying exponential expressions :

 1.1    y²¹³ multiplied by y⁴⁰ = y^{(213 + 40)} = y²⁵³

Final result :

  y253