$$\left. \begin{array} { l } { \alpha \frac { 1 } { \alpha } } \\ { 4 x ^ { 2 } - 2 x + ( k - 4 ) 1 c } \end{array} \right.$$
$4x^{2}-2x+ck-4c$
$$4x^{2}-2x+ck-4c$$
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$1,\ c\left(k-4\right)+4x^{2}-2x$
