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3 + 3 *[3 + 3 * ( 3 + 3 * 3)]= (3 * a + 3)* 3 + 3​

Răspuns :

Răspuns:

3+3×[3+3×(3+9)]=3+3×(3+3×12)=3+3×(3+36)=3+3×39=3+117=220