1) Subtract the following
a)5x2+3y2-4z2 from - 13y2+3z2-x2
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Answer:
-13y²+3z²-x²-(5x²+3y²-4z²)
-13y²+3z²-x²-5x²-3y²+4z²
-13y²-3y²+3z²+4z²-x²-5x²
-16y²+7z²-6x²
7z²-16y²-6x²
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