100*9.8+ x*30=(100+ x)*25
    100*9.8+ x*24.5=(100+ x)*25
    100*9.8+ x*491=(100+ x)*25
    100*21.7+ x*24.5=(100+ x)*25
    100*21+ x*24.5=(100+ x)*25
    100*20+ x*60=(100+ x)*25
    100*20+ x*70=(100+ x)*25
    100*20+ x*49=(100+ x)*25
    100*6+ x*75=(100+ x)*25
    x+（x×0.0039×24）=91128
    x+（x×0.0039）=91128
    x^x=2^1024
    144+3t²＝32t
    15x-160=1060
    sqrt（（t-9）^2+16）+t-9=0.5t
    20x-1060=5x-160
    20（x-53）=5(x-32)
    20（x-32）=5(x-53)
    16/7-x加上3/7=3/15
    (70.25X^2+22.825X^3)*(210.75+45.65X)/(210.75+136.95X)=81.59X+(40.075X^2+6.85X^3)*(240.45+13.7X)/(240.45+41.1x)

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