Calculation questions: (1) 5 out of 7 divided by 3-2 out of 21 (2) 14 * 39 out of 14-39 out of 14 divided by 14 (3) 1 and 9 out of 1 divided by [32 and 2 out of 5 - (32.4- 1 / 3 * 0.25)] * 12 on these three questions, thank you very much
(1)7/5÷3-21/2=7/15-21/2=14/30-315/30=-301/30
(2) 14 × (39 / 14) - (39 / 14) / 4 or (14 × 39) / 14 - (39 / 14) / 4 or 14 × (39 / 14) - 39 / 14 / 4
Please write clearly
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