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    √1145
    598911430.26-1491746.60-5000-716044.35=
    2.5×(-18)+(-25)×12+25×(-10)
    8+(-3)-5-2
    arctan(0.693/244.346)
    219117.84/(1+12%)^5
    12% * 1000000 *[(1+12%) ^7/ {(1+12%) ^7 -1}]
    -100000+60000/(1+12%)+50000/(1+12%)^2+60000/(1+12%)^3
    -75000+60000/(1+12%)+30000/(1+12%)^2+30000/(1+12%)^3
    5.6%*20%+14.7%*75%+10%*5%
    5.6%*20%+5.1%*75%+10%*5%
    (1200000-470000-300000)*(1-30%)+300000
    12.6%*2*150/500.2+9.41%*1*85/500.2+6.44%*0.12*960/500.2
    10^52.516
    7/1lg1000
    118×78+59×24+118×10
    123.156×cos130
    (916166195+498992042+706413177)/4227272926=
    (916,166,195+498,992,042+706,413,177)÷4227272926
    (916,166,195+498,992,042+706,413,177)/4227272926

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