acer's comment is an important one. I took the y1 expression that was not evaluating and gave it some assumptions and it then evaluated. I also recommend converting floating point coefficients to short rationals.

Here is a quick script showing what I did:

maple_int_example.mw

@Markiyan Hirnyk 

This is a very simple way around the problem. Thank you for your help.

@tomleslie 

Thank you for the solution :) I modified this one for the problem as well and it worked wonderfully.

@Carl Love 

Thank you for the answer. You are correct, it is a better, more intuitive way to do it. I applied this method to the problem and modified it slightly and it worked.

@Kitonum

Thank you very much for the solution, it works wonderfully.