efectuați:
a) [2⁰+(-3)]²×(-4+6)⁵×(8-10)⁶-2¹⁰×(-1+3)³
b)[(-2+5)⁴×3⁶]:3³:(-7+4)⁴+(-3)³
c){[10:(-5)]¹²:64-15}-(-7)²
​