【( (3.5-0.24)+(2.3-0.12) 】*2*2.92-1.0)-(1.1*1.5+0.9*2.1+0.8*2.0)
    （2.35+2.3+1.35-0.24+3.5+0.5-0.24）×2×2.92-（0.9×0.25+0.8×2+2.9*1+2.4×2+0.9×2.1×4）
    【（3.5-0.24）+（4-0.24）】×2×2.92-（1.1×1.5+1.5×1.5+0.9×2.1×2）+【（3.5-0.24）+（4-0.24）】×2×2.92-（1.1×1.5+1.5×2+0.9×2.1）
    （100*6^2）/（（（6^2）^3+4）（-6-9））
    （8-2）/3
    4.2/40/3
    arcsin0.6505
    arcsin0.65
    6.40312423743-e886202220223312345234523452241399163137991777111617932170123
    5.16/sqrt(6.28)
    ln6.06
    ln4.57
    ln3.5
    ln2.6
    ln0.46
    ln1.318
    ln1.315
    ln1.33
    ln1.31
    ln1.29

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