-(9x²-4x²+5)-(-3-8x³+3x²)
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-(9x²-4x²+5)-(-3-8x³+3x²)
-(9x²-4x²+5)-(-3-8x³+3x²)
-(9x²-4x²+5)-(-3-8x³+3x²)
-(9x²-4x²+5)-(-3-8x³+3x²)
解原式= -9x²+4x²-5+3+8x³-3x²
= 8x³-8x²-2