1.15*5.08
    1.15*4.87
    1.25*4.06
    1.2*4.06
    20*203
    20*03
    arctan60
    arctan3.278
    1/51.2
    1.2/3
    5/4一(5/1十15/4)
    10^1.231194
    lg4.58
    21^0.5
    0.45*104.3*√[0.5/(116*0.85)]
    10^（-2.2576）
    0.75*0.75*0.26*0.26+0.25*0.25*0.19*0.19+2*0.75*0.25*0.5*0.19*0.26
    0.75*0.75*0.26*0.26+0.25*0.25*0.25*0.25+2*0.75*0.25*0.3*0.25*0.26
    0.75*0.75*0.15*0.15+0.25*0.25*0.12*0.12+2*0.75*0.25*0.3*0.12*0.15
    【（7.0+0.24）×（2.9-0.45）】-1.1×1.5×2+10.24×2.45-7.89+6.22×2.45+1.52×2.3-1.04+10.24×2.45+0.5×2.45-（1.5×2+1×2.9+2.4×2）

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