/3×1/5×3

5×4/7×3/5

2/5×4×3/4

(1/10+1/5)×5

(8/9+4/27)×27

6×(1/9×7/30)

1/6×(7-2/3)

5/6×5/9+5/9×1/6

2/9×3/4+5/27×3/4

6/13×7/5-6/13×2/5

7/12×6-5/12×6

21×3/20

37×3/35

6/25×24

(3/5+7)25

3/4×1/2+3/4×2/5

5/7-4/9×5/7

13/18×25×9/26

16×(3/4-5/8+1/12)

1/3+4×(5+5/12)