EX-01 / AP02

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\[\begin{aligned} A(t) &= 3t + (2t^2 + 9) - (-9t + t^2)& \\ &=3t + 2t^2 + 9 + 9t - t^2& \\ &=t^2 + 12t + 9.& \end{aligned}\] \[\begin{aligned} B(x) &= x - (11-x^2) + (12x - 3)& \\ &=x - 11 + x^2 + 12x - 3& \\ &=x^2 + 13x - 14.& \end{aligned}\] \[\begin{aligned} C(y) &= -2y^2 - (3y - 6y^2) + (-5y + 9)& \\ &= -2y^2 - 3y + 6y^2 - 5y + 9& \\ &=4y^2 - 8y + 9.& \end{aligned}\] \[\begin{aligned} D(z) &= 7z + (5z^2 - 5z) - (2z - 3)& \\ &=7z + 5z^2 - 5z - 2z + 3& \\ &= 5z^2 + 3.& \end{aligned}\]

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code : 2826