40*600+50*200+2500*15+40*250
    40*300+50*100+2500*10+40*150
    4*300+50*100+2500*10+40*150
    4*600+50*200+2500*12+40*250
    4*300+50*100+2500*1+40*150
    2/3*4^(3/2)
    2/3*9^(3/2)
    9.5/1.872
    1.341*1.341*5/4
    log(12,12^21
    log(677,677^76772
    log(4567,4567^76272788886
    log(2,4
    150*(29-22)+90*(40-30)
    1000*sin(6.283*0.245)
    1+1+1+1+3+1+3+1+1
    （5*0.81+5*0.55+5*0.85+5*0.70+5*0.77+5*0.88+5*0.66+5*0.58+5*0.79+5*0.97）/50
    5×（log(182)-log(90.25))÷（log(252.25)-log(90.25)）
    5×（log(166.1875)-log(90.25))÷（log(252.25)-log(90.25)）
    5×（log(154.0625)-log(90.25))÷（log(252.25)-log(90.25)）

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