x-h 2 y-k 2 r 2
x-h 2 y-k 2 r 2, x-h 2 + y-k 2 r 2, x-h 2 - y-k 2 r 2, left x-h right 2 + left y-k right 2 r 2, left x-h right 2 left y-k right 2 r 2, x-r 2 + y-r 2 r 2, y x-h 2+k, x 2 - y 2, x-a 2- y-b 2 r2, x 2+xy+y 2 k, y x 2/2r
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x-h 2 y-k 2 r 2
x-h 2 + y-k 2 r 2
x-h 2 - y-k 2 r 2
left x-h right 2 + left y-k right 2 r 2
left x-h right 2 left y-k right 2 r 2
x-r 2 + y-r 2 r 2
y x-h 2+k
x 2 - y 2
x-a 2- y-b 2 r2
x 2+xy+y 2 k
y x 2/2r
x-h 2 y-k 2 r 2, x-h 2 + y-k 2 r 2, x-h 2 - y-k 2 r 2, left x-h right 2 + left y-k right 2 r 2, left x-h right 2 left y-k right 2 r 2, x-r 2 + y-r 2 r 2, y x-h 2+k, x 2 - y 2, x-a 2- y-b 2 r2, x 2+xy+y 2 k, y x 2/2r