Efectuati : a) 3×[5⁹:5⁸+(34-2⁴×5)²⁰¹⁵+8⁷:16⁵]
b)(2¹⁰-2⁹)×(2⁹-2⁸)×(2⁸-2⁷):2²⁴.
URGENT DAI CORAOANA!!!!!!!!!!​