Mathematics
Senior High

なぜマーカーの部分の式になるのですか??

2 (@ +す1二1.2二1.3二…….
* EE ご ー (et+gjg 相=Sm コマ 0 fre Nasamre ざ 3補っ TO0xTー を)二て 間還ES OO "を (①)

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