0.75*8/9
    arctan(1.69/1.33)
    2-1/3
    17^9
    11^2022
    6644349/1
    1/6644349
    （48.27+9.69）÷[（54,823,896,576.81+68,722,020,630.61）÷2]
    76-69
    11*16
    arctan(1.33)
    arctan(1.68/1.33)
    1-(1+12％)^-5
    (1+12％)^-5
    200000×12%/1-(1+12％)^-5
    200000*12%/1-(1+12％)^-5
    7/8*0.375+3/8/8/9
    -3×4
    238.914338-228
    40×30/(250×0.88×0.8)

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