(2)3/2x5+2/5x7+4/7x11+5/11x16+6/16x22+7/22x29+1/29

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(2)3/2x5+2/5x7+4/7x11+5/11x16+6/16x22+7/22x29+1/29

(2)3/2x5+2/5x7+4/7x11+5/11x16+6/16x22+7/22x29+1/29
(2)3/2x5+2/5x7+4/7x11+5/11x16+6/16x22+7/22x29+1/29

(2)3/2x5+2/5x7+4/7x11+5/11x16+6/16x22+7/22x29+1/29
原式=(91×126+63×80)/131=(91×2×63+80×63)/131=63×(2×91+80)/131=63×262/131=63×2=126