Calculation (those that can be simplified should be simplified) 15 / 16 - (2 / 3 + 1 / 4) 1 / 4-7 / 12 + 3 / 4-5 / 12

Calculation (those that can be simplified should be simplified) 15 / 16 - (2 / 3 + 1 / 4) 1 / 4-7 / 12 + 3 / 4-5 / 12

15/16-(2/3+1/4)
=15/16-(8/12+3/12)
=15/16-11/12
=1/12-1/16
=1/48
1/4-7/12+3/4-5/12
=(1/4+3/4)-(7/12+5/12)
=1-1
=0

6 / 5 ± (1 / 2-4 / 7 * 7 / 12) 510 ^ [42 * (5 / 6-3 / 7)] (simple calculation that can be simplified)

Original formula = 6 / 5 ÷ (1 / 2-1 / 3)
=6/5*6
=36/5
510÷[42*（5/6-3/7）]
=510÷[42*17/42]
=510*17
=8670

2 / 11 × 7 / 5 + 7 / 11 × 3 / 5, please do it as soon as possible,

Hello
2/11×7/5+7/11×3/5
=7/11x2/5+7/11x3/5
=7/11x(2/5+3/5)
=7/11x1
=7/11
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How to calculate (2 / 7 + 1 / 5) × 7 × 5 and 1 / 12 + 11 / 12 × (2 / 5-1 / 3)

1、　(2/7+1/5)×7×5
=（10/35+7/35）×7×5
=（17/35）×7×5
=（17/35）×35
=17
2、 1/12+11/12×(2/5-1/3)
=1/12+11/12×（6/15-5/15）
=1/12+11/12×1/15
=1/12+1/12×11/5
=1/12×（1+11/5）
=1/12×16/5
=4/15