Mathematics
Senior High

こちらの3問の計算過程と解答分かる方教えて下さると嬉しいです💦どれかでも分かる方教えてください🙇‍♀️

-らえさ9-4 -22すースtyー> 2 © aCb-C)+bてC-2)+c(a-b)

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