(75.5(1-25%))/1.78^2
    (5^6-1)/7
    sin(-0.49507)
    4.559233-1.773487161087
    arctan[sqrt(1-(0.00627760618147)^2)*sin(-0.0311677402)/(sin(-0.0311677402)-0.00627760618147)］
    -0.03116432523216301+0.006277670618147*sin(-0.031167)
    -0.03116432523216301+0.006277670618147*sin(-0.03116432523216301)
    sin(-2.838305071)
    arctan[(sqrt(1-0.006277670618147)*sin0.031171)/(cos0.031171-0.006277670618147)］
    sin(-2.83799427)
    (cos0.031171-0.006277670618147)/(1-0.006277670618147*cos0.031171)
    arcsin0.3079
    (1550+1.5122*500)/(1000+500)
    （53800-6000）/（88000-6000）
    √230700
    2√3600×√230700
    2√3600×230700
    0.5*(lg32/lg2)
    5-sin2
    4*3.14*6400^2*0.7*4*10^15*25

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