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Positive solutions of several math problems 100.
Solution: 1 original formula = ﹙ 9//kloc-0 ﹚× 30-﹙1﹚× 30 = 27-2 = 25.

2 Original formula = ﹙-2/3 ﹚×-36 ﹚-5/9 ﹚×-36-7.

3 Original formula = (4/7) ×-56+(3/8) ×-56+0.

4 original formula =-18-1/3-18-6513; .

5 Original formula = [-8-5] =-3

6 Original formula =-3 ×-6-2 = 9

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