answer these three question
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2)a=x-y+4
b=xy+6
c=x^2=y
3)A. 4a+6=4×4+6=16+6=22
B. 12a-3b=(12×4)-3×2)=48-6=42
C. ab-2=(4×2)-2=8-2=6
4) x^4+y^6=(3^4)+(2^6)=(3×3×3×3)+(2×2×2×2×2×2)=81+64=145
b=xy+6
c=x^2=y
3)A. 4a+6=4×4+6=16+6=22
B. 12a-3b=(12×4)-3×2)=48-6=42
C. ab-2=(4×2)-2=8-2=6
4) x^4+y^6=(3^4)+(2^6)=(3×3×3×3)+(2×2×2×2×2×2)=81+64=145
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