OSX Yosemite Calculator

When I saw an icon for calculator I felt like it's not done right. Overall it looks ok, but it lacks in the details compare to other icons on OSX 10.10. So I decided to improve it a little.
I also found out that many icons have the same dimensions so I decided to share that information too.

Would love to share result with you and appreciate any feedback.

Check out Sketch file in the attachment and use it as you want.