160.52+16.6×7.4
    295.21×0.692-2×1.4×√0.692
    172.37+16.6×7.4
    (427.81×14.28+3041.75×4.68)/(44.66×18.5+171.11×16.55+1781.34×5.63)
    （1+6.10%/12）^12-1
    (427.81×5.52+3041.75×15.12)/(44.66×1.3+171.11×3.25+1781.34×14.17)
    300.86×0.692-2×1.4×√0.692
    58.5×0.692-2×1.4×√0.692
    2.61×5.85
    278.42×1.446+2×1.4×√1.446
    92.5+16.6×11.2
    320.198×0.692-2×1.4×√0.692
    29.2+16.6×17.53
    2/sin70
    2/sin45
    cos40
    0.7*(0.045-0.022)
    100*9+(1452/6.6-100)*9*50%
    arcsin0.62
    arcsin0.48

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