4x^2 + 36 / 4x * 1 / 5x

Given with a polynomial 4X² + 36/4X * 1/5X, we can combine terms with the same power. First, let us perform multiplication of the 2nd and 3rd terms such as the given become 4X² + 36/20X². Then, we can reduce 36 and 20 by 4 and the result is 4X² + 9/5X². We can now proceed combining the terms since they have same power and result will be same as below:

(20X^4 + 9) / 5X²