Mathematics
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    acos(0.5)
    acos(0.5)
    ln(9/7)
    sin(1/7)
    sin1/7
    2sin(160-60)
    2sin(140-60)
    4.61×7/3-5.39×(-7/3)+3×(-7/3)
    4.61×7/3-5.39(-7/3)+3×(-7/3)
    400×(0.35+0.15×105/100+0.1×89/85+0.3×188.6/113.4+0.1×113/110-1)
    100×(0.35+0.15×105/100+0.1×89/85+0.3×188.6/113.4+0.1×113/110-1)
    100×(0.35+0.15×105/100+0.1×89/85+0.3×118.6/113.4+0.1×113/110)
    (300+100)×(0.35+0.15×105/100+0.1×89/85+0.3×118.6/113.4+0.1×113/110)
    (300+100)×(0.35+0.15×105/100+0.1×89/85+0.3×118.6/113.4+0.1×113/110-1)
    50*e^(0.275)-40
    3.1*e^(-0.05)
    100*e^(0.05)
    4.8*e^(-0.05)
    60*e^(0.05)
    30*e^(0.05)

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