Answer: -4x⁴ + x² + 6
Step-by-step explanation:
Remove parentheses: (-a) = -a
-4x⁴ + 6x²+3 - (5x²-3)
-4x⁴ + 6x² + 3 - 5x² + 3
Simplify -4x⁴+ 6x² + 3 - 5x² + 3: -4x⁴ + x² + 6
-4x⁴ + x² + 6
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