n = 0
For j = c To d Step hy
result &= ControlChars.CrLf
n += 1 : m = 0
For i = a To b Step hx
m += 1
ans = Exp(-(i ^ 2) * j) '#### ตำแหน่งใส่ฟังก์ชัน ####'
func(m, n) = ans
result &= ("F" & "(" & i & "," & j & ")" & ControlChars.Tab & "=" & ControlChars.Tab & ControlChars.Tab & String.Format(ans) & ControlChars.CrLf)
Next
Next