2ax - 4bx+2by

This is an algebraic expression that can be simplified by factoring out the common factor of 2:

2ax - 4bx + 2by = 2(a-b)x + 2by

Now, we can factor out the common factor of 2 again:

2(a-b)x + 2by = 2(a-b)x + 2b(y)

And finally, we can write this expression in a simplified form:

2(a-b)x + 2b(y) = 2(a-b)x + 2by