$$\left. \begin{array} { l } { f = ( 2 x + y ^ { 2 } ) + ( 2 y ) ! f } \\ { A ( \right.$$
$x=\frac{-f\times \left(2y\right)!-y^{2}+f}{2}$
$$2x+y^{2}+\left(2y\right)!f=f$$
$$2x+\left(2y\right)!f=f-y^{2}$$
$$2x=f-y^{2}-\left(2y\right)!f$$
$$2x=-f\times \left(2y\right)!-y^{2}+f$$
$$\frac{2x}{2}=\frac{-f\times \left(2y\right)!-y^{2}+f}{2}$$
$$x=\frac{-f\times \left(2y\right)!-y^{2}+f}{2}$$
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