(2x - y + 2)³
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this is the answer okyaa
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=(2x-y+2)³
=(2x-y+2)(2x-y+2)²
=(2x-y+2)(4x²+y+4-4xy-4y+8x)
=2x(4x²+y+4-4xy-4y+8x)-y(4x²+y+4-4xy-4y+8x)+2(4x²+y+4-4xy-4y+8x)
=8x³+2xy+8x-8x²y-8xy+16x²-4x²y-y²-4y+4y²-8xy+8x²+2y+8-8xy-8y+16x
=8x³-y³+8
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