Completati puterile de la 1
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a ) 13¹² · 13²⁵ = 13¹²⁺²⁵ = 13³⁷
b ) ( 17⁴)¹⁵ = 17⁴ˣ¹⁵ = 17⁶⁰
c ) 19⁵³ : 19⁴⁰ = 19⁵³⁻⁴⁰ = 19¹³