(4798.352+75155.52+41842x+344.922x+373.6x+206.9496x)*0.7= 345741+2838712.5+4123.4x+298951.05+1067660.39
    x*99.975%-120.254*100.025%=0.5/10
    x*99.975%-120.254*100.025%=1/10
     i+8%/9%-8%=5-4.6610/5.6044-4.6610
    x*99.975%-120.341*100.025%=0.5/10
    x*99.975%-120.341*100.025%=1/10
    12.11c=（3.3+c）×7.97
    12.11c=（3.3+c）×7.98
    12.11c=（3.2+c）×7.97
    (1/4x+7/10x+1)-(x+2)=2
    X*60+X*154.8+X*113.36=87398.8794941333
    50x×90%=40x+800
    X*500=30+(600+15)*500
    5x+7=8
    (x-40)【500-(x-50)÷0.1】=8000
    21:63=（35.6%-X）：（X—14.2%）
    1:6=X:9
    5(x+2)=2(x1－4)
    arccot(1/7)
    X=1/12*4.4（0.105²+0.075²）

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