а) a²+9a²-6ab+b²= 10a²-6ab+b²
б) 64x²-16xy+y²-64x²= y²-16xy
в) 2a²-4ab+2b²
г) -9x²y+6xy²-y²
д) 4a-a²+16-8a+a²= 16-4a
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а) a²+9a²-6ab+b²= 10a²-6ab+b²
б) 64x²-16xy+y²-64x²= y²-16xy
в) 2a²-4ab+2b²
г) -9x²y+6xy²-y²
д) 4a-a²+16-8a+a²= 16-4a