0.97*(5+2*x)/(5+x*2*5^0.5)=1
    (2*d+1.5)*(d*d-2d+5)=(2d-2)*(d+2)*(d-0.5)
    （10-x-5)(500+200x)=2800
    x^x=2048
    94000nm^3
    x^3-6x^2+9x-1=0
    x÷x＋136
    1/d+1/(d+1)+1/(d+3.5)+1/(d+3-√(-4)+1/(d+3+√(-4)=0
    X+0.13X=37685
    729（4290a-330120）＝4290a（359-0.5a）+69682680
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=1000000
    3x^2+16x+16=0
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=1634283.67
    4*s^3+15*s^2+16*s+6=0
    0.97*(5+2*x)/(5+x*2*5^0.5)=1
    70000*3000*1.1^t=50000000+210000000
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=448178.31
    cos(x+3/2*π)
    0.06+0.3*x^1.5=0.55
    (2cosx^2)/x

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