arccos0.9
    -1^-1
    -arctan(-3^0.5/2)-90
    sin(arccos0.9)
    arccos(0.8)
    arctan(-1.732/2)
    -arctan(-66/63)-arctan(-66/113)
    ln(1+0.04)
    10000000+8869204.300007
    0.886920430000716*10000000
    e^(-0.12)
    1000*e^(-0.12)
    360-75-60-130
    0.35/0.04/0.8
    e3 22
    e^2.4
    e^1.8
    e^1.2
    e^0.9
    e^0.6=

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