15482
because of a math thing
see 14 is 1 and 4 which can be either
1, 3, 4 or 5
but you can also do the square root of 4 which is 2, so it can be
1, 2, 3, 4 or 5. Which left a lot of possibilities for the math game
15 is 1 and 5 which can only be 1, 4, 5 or 6, but then you can do sqrt([-1] + 5) which allows it to equal 2
1, 2, 4, 5, 6. The first two numbers being able to equal 2 helps a lot
but 16, 1 and 6, cannot equal 2 in any combination you put it

((-1) + 5) x 4 / 8 = 2