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b)=5*4=20
c)=2+12=14
d)=2+3*(-1)=2+(-3)=2-3= -1
e)=5*(-1)= -5
f)=(2-3)*4=(-1)*4= -4
g)=(2-3)*(-4)=(-1)*(-4)= -(-4)=4
h)=(2+3)*[-4-(-6)]=5*(-4+6)=5*2=10