calculate:
a) (-2)⁻³ × 0,8+(-1)⁵+(-19+2005)⁰;
b)-0,(6)+0,1(6)-0,6;
c)(-43+3² ˣ2) : (-5)⁷+(-17+15) ˣ (-1)³.
please!i give in: 50 puncte:*