Revision history of "2 − −7 = 9" (Z17118)

Okutorana ebya entaniso: Ramba otu pesha twa sako otwa empindahinduka ku jeragyeranisa Kandi onyige ipesha rwa Tahamu ninga ipesha erya ahansi.
Legend: (⧼eriho⧽) = entaniso na empindahinduka eriho, (⧼ehererukire⧽) = entaniso na empindahinduka ehererukire, ⧼empindahinduka enkye⧽ = empinduka enkye.