Mathematics
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    log(3,27)+(-2)-2012×2013÷2013
    (211819+5000*88)/(413+88)
    C(48/54)
     10.1×e^(-0.8-0.84×1.7/3)+3.29×e^(-0.8-3.4/3)
    ((7/9)-(7/3))*9+(1/3)/(-(1/3))
    sqrt(6800)
    12333*0.15
    2^0.64
    √3/√3
    √3
    1+1/1300(120000/2600+20)/460(7358/500)2×0.69
    1+1/1300(120×106/2600×103+20)/460(7358/500)2×0.69
    2+3=
    arctan0.824
    arctan0.7724
    arctan0.786773
    90000000000-1
    arcsin0.5=
    arctan(sqrt(3))
    -5000 *(√75)^2/[((√75)^3-75*(√75))^2+(20*(√75)^2)^2]

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