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2014-11-09T20:36:18+02:00
11¹¹+22²²+33³³+44⁴⁴=11¹¹+(2x11)²²+(3x11)³³+(4x11)⁴⁴=
=11¹¹+2²²x11²²+3³³x11³³+4⁴⁴x11⁴⁴=11¹¹(1+2²²+3³³+4⁴⁴)