( a) (2².3¹ ) : 7.3 - Ⓒ) (2.3²:5*): (2²:3²:57 10 e (2²+3^²). (2.340) = d ( 2 · 3² ): (2¹-3²): (2³-5 8 1 41 521 31.3 6 3 5 23​