va rog sa ma ajutați

a) 58000-1311x8:23=58000-10488:23
=58000-456=57544
b) 1789x52-(12987+43488:36)=93028-(12987+1208)
=93028-14195=78833
c) 400213-[239x(4007x12-48084+1965:5)]=
=400213-[239x(48084-48084+393)]=
=400213-(239x393)=400213-93927=306286