40+x+40x=25
    x^4 + 10 x^3 + 35 x^2 + 50 x + 24 = 0
    x^11 - 55 x^10 + 1320 x^9 - 18150 x^8 + 157773 x^7 - 902055 x^6 + 3416930 x^5 - 8409500 x^4 + 12753576 x^3 - 10628640 x^2 + 3628800 x = 0
    3^x+4^x=5^x
    x^10 - 55 x^9 + 1320 x^8 - 18150 x^7 + 157773 x^6 - 902055 x^5 + 3416930 x^4 - 8409500 x^3 + 12753576 x^2 - 10628640 x + 3628800 = 0
    x^9 - 45 x^8 + 870 x^7 - 9450 x^6 + 63273 x^5 - 269325 x^4 + 723680 x^3 - 1172700 x^2 + 1026576 x - 362880 = 0
    x^8 - 36 x^7 + 546 x^6 - 4536 x^5 + 22449 x^4 - 67284 x^3 + 118124 x^2 - 109584 x + 40320 = 0
    x^7 - 28 x^6 + 322 x^5 - 1960 x^4 + 6769 x^3 - 13132 x^2 + 13068 x - 5040 = 0
    7.1 = (3.1415926/3)^(2/3)*(1.38)^2*x*(6.1)^(1/3)/(1.0546)^2
    3.21=(3.1415926/3)^(2/3)*(1.38)^2*x*(0.057)^(1/3)/(1.0546)^2
    x*2+1
    300=(30+2x)x
    0.9*(10^28)=(1/3/(3.1415926^2))*((10.1*2.23*1000/1.0546)^3)*(x^3)
    0.9*10^28 = 1/(3*3.1415926^2)*(10.1*2.23*x/(1.0546*10^(-3)))^3
    0.9*10^(28) = 1/(3*(3.1415926^2))*(10.1*2.23*10^(-31)*x/(1.0546*10^(-34)))^3
    0.9*10^28=1/(3*3.1415926^2)*(10.1*2.23*x/(1.0546*10^(-3)))^3
    6.1 = (1/(3*(3.1415926)^2))*(9.9*x/1.0546)^3
    6.1=(1/(3*(3.1415926)^2))*(9.9*2.23*x/1.0546)^3
    3.86 = (3.1415926/3)^(2/3)*1.38*1.38*x*(0.9)^(1/3)/((1.0564)^2)
    （（80-69）*0.021+2.28）*1.8+0.06+0.28+1.31=x

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