sinx+cosx+tanx+x^x=9
    x^(sinx)-x^7+cosx+36-tanx=9
    5/7x-225-x+75
    4000x^2+40000/x^2+38000
    4(6x+8)+12=4x
    4(6x+8)+12=4(6x+8)
    x^x=10
    (x-30)*[100+(40-x)*5]=2500
    x*[100+(40-x)*5]=2500
    （x-30)*[100+(40-x)*5]=2500
    x²-4x-2020＝0
    630x-250=348.5
    －2x+8＝-4/x
    25080.1x－1787.5sin2πx＝5772.75
    6000/x-3600/1.5x=15
    (3x)×(3x)+(2x)×(2x)=(6-2x)×(6-2x)
    (sqrt(abs(x+1))-sqrt(abs(x)))/(sqrt(abs(x+0.5))-sqrt(abs(x)))=45.6701/26.5259
    ((abs(x+1))^(1/2)-(abs(x))^(1/2))/((abs(x+0.5))^(1/2)-(abs(x))^(1/2))=45.6701/26.5259
    1000000*(1-1.56%)-500000-26128.2-24440-50000-(1000000/1.09*0.09-16019.42-1383.4-3005.9-X/1.03*0.03)*1.12 = X
    1000000*(1-1.56%)-500000-26128.2-24400-50000-(1000000/1.09*0.09-16019.42-1381.13-3005.9-X/1.03*0.03)*1.12=X

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