if exp = 0 
	num
else
if exp > 0 and exp <= 6
	num + exp*0
else
if exp > 6
	num +e.exp
else
if exp < 0 and exp > -length
	num . num
else
if len < -length and len > -length - 6
	0.0exp num
else
if < -length - 6
	1.num exp



