The balanced equations are:

 2 CuS(s) + 3 O2(g)  + 2 C(s)     ----->  2 SO2   +  2 Cu(s)    + 2 CO(g)

C6H12O6(aq)  + 6 O2       ---->   6 CO2  + 6 H2O(l)   the coefficient "1" is assumed and is not usually written in.

 2 C8H18(l) + 25 O2 (g)----> 16 CO2(g) +  18 H2O(l)