lg25744152
    6.153*4.184*10^6
    1.465*2.1*2
    978.049*(1+0.005288*0.282846-0.000006*0.811376-0.000309*48)
    (sin32.129359)^2
    (sin64.258718)^2
    32.129359*2
    pow(2,2)
    sqrt(4)
    99200-98448
    3.2*1.465*21*1000
    99200/（1.465*21*1000）
    99200÷30765
    99200/30765
    1.465*21*1000
    3*2^10
    7680*64*50/(7680*2*400/1.6)
    7680*64*50/(7680*3*400/1.6)
    1920*64*100/(1920*4*400/1.6)
    1920*64*200-1920*4*400/1.6

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