(1 3/4-4)*(1 3/4-2)-(1 3/4-1)*(1 3/4-3)

1)1 3/4-4= -3 4/4+1 3/4= -2 1/4
2)1 3/4-2= - 1 4/4+1 3/4= -1/4
3) -2 1/4*(-1/4)=9/16
4)1 3/4-1=3/4
5)1 3/4-3=1 3/4-2 4/4= -1 1/4
6)3/4*(-1 1/4)=3/4*(-5/4)=-15/16
7)9/16-(-15/16)=9/16+15/16=24/16=12/8=3/2=1,5