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2.(1)+(3/-3) -8
2 + (-1) -8
2 -1 -8
2- 9 = -7
2(+1)-1-8=
2-1-8=
-7
x=2 y=3 z=0
x(-y+4)+y/1-4+x-10=
-xy+4x-y/3+x-10=
5x-xy-y/3-10