a) (-3/32)*(-8/9)*(-27/9)=-3*8*27/32*9*9=-8/32=-1/4
b) (-25/18)x49/10x(-4/35)=+25*49*4/18*10*35=7/9
c) (-5)*(+7)*(-3/5)=+21
d) (-7/9)*(-1)*5/7*(+3)= + 5/3
e) (-1/4)*8*(-1)*(+6)*(-1/12)=-12/12=-1
f) 7/3*(-19/36)*(-15/14)=+7*19*15/3*36*14=19*5/36*2=95/72
g) (-2,5)*7,(3)*(-4)=+25/10*73/9*4=5*73/2*9=365/18