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expand and simplify:2(x÷2)squared-(2x-1)(x+2)

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  1. 2(x+2)^2 - (2x-1)(x+2).
    2(x^2+4x+4) - (2x^2+4x-x-2).
    2x^2 + 8x + 8 - 2x^2 - 3x + 2.
    5x + 10 = 5(x+2).

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