Mathematics
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    45+87+8+9+4+5+6+3+2+5+8+9+7+5+6+4+65
    56+98
    arctan(33.6/66.3)
    arctan(38.7/81.9)
    arctan(93.6/35)
    -1--2
    1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1
    sqrt(1+2*sqrt(1+3*sqrt(1+4*sqrt(1+...))))
    15^2
    34:16
    34:8=
    2561*10.58*1.25*1.2*1.25
    2561*10.58*1.25*1.2
    (5.6+2+0.3*2+1)*1.15
     (300*6.25+1195*20)*(0.15+0.10+0.09+0.20+1)
    (300*6.25+1155*20)*(0.15+0.10+0.09+0.20+1)
    120*72
    120*0.15
    9-7.065
    2.25*3.14

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