41*41 51*51 61*61 71*71 81*81 91*91
    50*50 60*60 70*70 80*80 90*90
    5%5
    25*25 35*35 45*45 55*55 65*65
    6e2-31e+44
    (84.65*10^6)/(1-(1-84.65*10^6/(680*10^6))*(15.07/19.62)^2)
    (84.65*10^6)/(1-(1-84.65*10^6/(680*10^6))*(15.07/15.7)^2)
    (88*10^6)/(1-(1-88*10^6/(683*10^6))*(14.94/15.7)^2)
    1000*32.72^3/12+1000*32.72*(32.72/2)^2+3929.25*(169-32.72)^2
    (3-0.81)*0.68*10^9/(200-101.155)
    0.6*25^(1/2)
    (2.5*0.0031)/(1+50*0.0031)*200*10^3*600*10^(-6)
    1000*200^3/12+1000*200*(100-101.155)^2+3405.39*(169-101.155)^2
    5+23
    (0.016444903*ln1.1+2*0.016444903)/(1.1^2*(ln1.1)^3)
    (0.016444903*ln0.3+2*0.016444903)/(0.3^2*(ln0.3)^3)
    1925.4*(sin1.32)^3/3.14+295.44*(sin1.32+sin1.29)/3.14
    0.016444903*ln10+2*0.016444903
    0.016444903*ln1+2*0.016444903
    (15*(-0.00067713395)*10^(1.5)+4*0.022507081)/4*10

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