Mathematics
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    1/0.8
    1/0.85
    1/0.95
    1/0.9
    π/√15
    π/1.5
    arccos(-0.8)=
    arccos(-0.456)=
    arctan(0.00062)
    !(20)
    C(10,5)
    tanarccos0.92
    tanarccos0.91
    tanarccos0.8
    tanarccos0.86
    4709188×(7%+3%+2%)
    4709188×(5%+3%+2%)
    4709188×(7%+3%+2%)
    4709188×(5%+3%+2%)
    4709188×(5%+3%+2%)

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