Mathematics
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    √((4.2-1.6)^2+0.9^2)
    sin15
    sqrt(sqrt2+65/4)-9/2
    sqrt(sqrt2+65/4)+9/2
    2∧2
    ln2.63+0.9ln2.84
    5/0.268*2+10
    sin 0.07983
    sin0.97983
    9+9.9+9.99+9.999+9.9999+9.99999+9.999999
    tan20-20
    tanarccos0.88
    tanarccos0.89
    tanarccos0.87
    tanarccos0.86
    tanarccos0.95
    tanarccos0.87
    tanarccos0.88
    tanarccos0.89
    tanarccos0.87

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