X
xeko_mu


5 + 1 =10
x-1 y-1
1 + 3 =18
x-1 y-1
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(x+2)(y-2)=xy
(x-4) (y-3)=3x+6
2x^2+y^2=10
x^2-2y^2=5
/ x /+ /y-2 /=1
/x-1/ ! + 3y =3
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