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10. Calculează. LXIX-XXVI = LXXII-XLIX = XC-LXXIV = CXIX + XLIII = MLXV + DVI = XLVI + D = CLXVI-L = DXXVIII-LIX = DVI-XLVI = DXLII + XLIX = XXVIII+XXIX = LXXI + XI =​