$$\left. \begin{array} { l } { 980 } \\ { 6 x } \\ { - 3 x + 7 y - 1 } \end{array} \right.$$
$2940x\left(-3x+7y-1\right)$
$$980=2^{2}\times 5\times 7^{2}$$
$$2940x\left(-3x+7y-1\right)$$
$$-8820x^{2}+20580xy-2940x$$
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$980,\ 6x,\ -3x+7y-1$
