14 <= 2 - 3g < 15
(x-2)^2
(x-1)^2
[4÷(6-2)+7²] - [2-(-5)]²
2x+y=6
2x-y=2
18400/441
-13/14 ×-3/9 × 4/7 ×-9/2
-3/-4
145,715,000.00-1%
-13/1-4×