2300+435+800+5000+40440+700+31800+830+5602+360+140+7900+34233+600+170+2160+515+3500+3700+8250+29608+5100+2780+8800+70+360+160+82+42300+230+400+384+470+1400+1180+1600+1811+118+225+3900+150+70+836+364+1200+650+760=
    940➕1210➕1790➕1790➕6290
    281×11
    3.4/[(1.25+.45)*23]
    3.4/[(1.25+.045)*23]
    100÷6×6
    -1/4-1/2
    111310.105453474854585*7.03*0.0000765
    7.65*10^(-5)
    3381^1.43
    2+2*2*0
    【30】2
    1+1
    C(3,1)*C(40,2)/C(43,4)
    10/3*271-(130*10/3-1056)
    7.6471817*10^(-5)
    1/(1.43346*0.589583)
    4.1775*10^(-9)
    1/9801
    C(16,3)*C(15,6)*C(9,5)

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