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a) 8⁷×4¹⁰÷2¹⁵=(8×4÷2)¹⁵= b) 9²³÷27¹¹×3⁵⁵= c) 25¹¹×5³¹÷125⁹= d) 7²⁹×49³¹÷343¹²=
PLS REPEDE DAU COROANĂ T-T​