a) 10+4×3^2-7×5-(3+2^3)=
10+4×9-7×5-(3+8)=
10+4×9-7×5-11=
10+36-35-11=46-35-11=11-11=0
b)2017-{[42-(5^2×14-85×4)×2]×3+2^6}=
2017-{[42-(25×14-85×4)×2]×3+64}=
2017-{[42-(350-340)×2]×3+64}=
2017-[(42-10×2)×3+64]=
2017-[(42-20 )×3+64]=
2017-(22×3+64)=
2017-(66+64)=2017-130=1 887
c)(10^2-7^2+5^4)×(223^0+1^1500)=
(100-49+625)×(1+1)=(51+625)×2=676×2=1352