does 53x4 +53x6= 56(4=6) need to know for math

It could depending on the value of x.

Not sure I understand with the equal sign in "56(4=6)

I THINK this is what you are asking

53x^4 + 53x^6      does NOT equal 53x^(4+6)   it DOES equal  53 (x^4 + x^6)

I THINK this is what you are asking

53x^4 + 53x^6      does NOT equal 53x^(4+6)   it DOES equal  53 (x^4 + x^6)   which, I should add, you can change to:  53 x^4 (1 + x^2)