6/25×15/16
6/14×10/12
12/20×3/8
x^2-2x-35/x^2+13x+36≤0
2
(
12
11
−
5
8
)
3
÷
10
9
+
4
8/9×7/10
3/11×6/8
5/6×7/8
7/9×4/5
4.5(2.2r-3.6)=34.9
