If p = 5x^3+3x^2-4x+1 , Q = 3x^3+5x^2+3x-8 and R = 6x^3-4x^2-7x+3 , find ( P+Q ) - R .
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p=5x³+3x²-4x+1
q=3x³+5x²+3x-8
r=6x³-4x²-7x+3
find =(p+q)-r
=[(5x³+3x²-4x+1)+(3x³+5x²+3x-8)]-(6x³-4x²-7x+3)
=(8x³+8x²-x-7)-(6x³-4x²-7x+3)
=2x³+12x²+6x-10
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