Areas of knowing - MATH

Questions

1 It is believe that: God created integers, and other numbers are artificially created. Is math the result of real-life observations or it is based of human imagination?

2 If math is artificially created what is its significance of explaining the nature.

3 John K once said that the only thing that is infinite is our imagination, we live in a limited world, does math contradict with reality?

4 Is our imagination playing a positive role in the understanding of truth, or it is creating barriers?