arccos0.968
    arccos0.995
    32+2
    69×(-96)÷(-92)÷36
    (-875)÷35×75÷(-125)
    (-875)÷35×225÷505
    (-666)÷144×(-96)÷148
    （-98）÷(-91)×(-78)÷42
    55×(-365)÷(-25)÷73
    7178.67/528.71
    −75999.85009*sin(-15)/sqrt(74746.76sin(-15)+154072.92)-2840371277.3566*cos(-15)*cos(-15)/(74746.76sin(-15)+154072.92）/sqrt(74746.76sin(-15)+154072.92)
    arctan3-arctan（1/3）-arctan（15/90）
    arcsin0.153
    arctan10-arctan100-arctan0.5-arctan0.125
    arctan10+arctan100-arctan0.5-arctan0.125
    arctan2.236+arctan0.559
    tan1.2
    cos0.75
    2*6
    1/(2*0.8706532298306+1)+1/1.7014007081444

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