3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 13.2-0.3-2.4-0.3 17.5-3.56+6.44 120.39-87.62-12.38 8.53-2.72+3.28
    1.29+3.7+2.71+7.3 2.64+8.67+7.36+11.33 3.2+1.79-0.59+1.75
    12.45-1.55-0.45 1.57+0.245+7.43 3.07-0.38-1.62 12.45-1.55-0.45
    4.72+0.1-4.72+0.1
    777/(150+20+80)=
    147*99+147
    168÷(1-0.16)
    1.2×1500×0.1667×1000/5078
    tan(0.2)*1000
    tan(0.2)*10
    tan(0.2)*10
    2.08^0.5
    5^0.5
    158×(1-0.42)/(1-0.42×1.5)×1500/3600
    0.25×1004[(1.5-1)+√((1.5-1)^2+(8×(1.5-0.5))/1004)]
    85.7/(1+17%)*17%
    √((1.7-1)^2+(8×(1.7-0.5))/1004)
    10/100/4
    〖92.727〗^2/(2×12000)
    -90-arctan（0.2*0.06）-arctan（0.02*0.06）

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