π+arctan2
    arccos-0.4
    π-arccos-0.4
    π+arccos-0.4
    π+arcsin-0.4
    arcsin-0.4
    π+arcsin-0.7
    π-arcsin0.7
    arcsin0.7
    arcsin0.5736
    π+arctan3
    π-arctan3
    2π-arccos0.2
    arccos0.2
    2^-1
    2^log(½，3)
    log(½，3)
    3+3
    !(67)
    9*267.2*0.01*2.98+11*92*0.01*0.888+11*267.2*0.01*2.98+11*132*0.01*0.888

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