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2014-10-24T16:18:56+03:00
 {[2² * ( 1+2+3+...+100) /10100] ²⁰¹³} / 2²⁰¹³=
= [(2² * 100*101:2 /10100) ²⁰¹³] / 2²⁰¹³=
= [(2² :2 ) ²⁰¹³] / 2²⁰¹³=
=2²⁰¹³/2²⁰¹³=
=1
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