Mathematics
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    0.2/1.003*10^6
    0.5(19880.72)^(-0.5)
    20+25+30+35+40+......+515
    9.1+9.2+9.3+8.9+8.8+8.7+ (5.6×9.6×10.6) ÷(2.8×4.8×5.3)=
    9.1+9.2+9.3+8.9+8.8+8.7+ (5.6×9.6×10.6) -(2.8×4.8×5.3)=
    (2.89+0.44)*tan34/(2.5*tan34.07)
    -2.5*cos53.72*cos34.07+2.5*cos34.07*sin53.72
    2.5*cos53.72*cos34.07+2.5*cos34.07*sin53.72
    115.24*2*tan45/(2tan45.2)
    115.24*2*tan45/(sin77.3*tan45.2)
     -cos53.72*2.5*cos34+sin53.72*2.5*cos34
    cos53.72*2.5*cos34+sin53.72*2.5*cos34
    600×48.33%/12
    (1280-300-400)/(1500-300)×100%
    (ln100000000000000000000)/(100000000000000000000^(0.5))
    arccos(cos(45) sin(45) cos(45) sin(45) + sin(45) sin(45) sin(45) sin(45) sin(45) sin(45))
    atan2
    350*12
    76864/4096
    (ln1000)/(1000^(0.5))

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