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2014-10-02T22:17:26+03:00
(-5/18) + (-7/12)+(+9/16)+(-11/36)=(-5/18-11/36)+(-7/12+9/16)=(-10-11)/36+(-28+27)/48=
=-21/36+-1/48=SIMPLIFICAM=-7/13+1/48=(-91+13)/624=-78/624=-39/308=
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