37x^2＋7900=100√5800＋58x^2
    x-6/x
    x=x^3
    (x*85%+(500-x)*13.5%)/500=15%
    (x*85%+(500-x)*13.5)/500=15%
    1-sinx
    8.156*(f+f-4.75)+3.925*(f-4.75+f-15.29)+2.720*(f-15.29+f-16.82)=6*140*195*2/1000
    168000+4700+0.06x=110000+2500+0.5x
    168000+4800+0.06x=110000+3000+0.5x
    （x-39020.6）-（（x-10000）*10%-2520-1020.62）=38000
    X+5%X=500000
    （1010+6x）（570+x）=845
    x*99.975%-120.121*100.025%=1/10
    （3.14*0.65*0.65*2x/360）-0.65*0.65*cosx*sinx=0.6
    4x^4-5x^2+1=0
    【（220+260）*21-X】*0.9+18*21=9240
    x*99.975%-120.138*100.025%=1/10
    x*99.975%-120.155*100.025%=1/10
    (91336.496+60403.2+41842x+344.922x+373.6x+206.9496x)*0.85=2262000+345120+4144.26x+298951.05+2460741.39
    （3.14*0.65*2x/360）-0.65*0.65*cosx*sinx=0.6

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