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Let $x =( -6, 2, -7 )$ and $y = ( 6, 10, 1 )$ be in $\mathbb R^3$ . Compute the following:

$x + y$ = (, , )

$-6 x=$ (, , )

$x - y =$ (, , )

-6 $x + 8 y$ = (, , )

You can earn partial credit on this problem.