1, 2x2+4xy+2y2+3x+3y-2=0
3 x2-32 y2+5=0
2, 2x2+4xy-2x-y+2=0
3x2+6xy-x+3y=0
3, x2+2xy+2y2+3x=0
xy+y2+3y+1=0
4, x2+y2+x-2y=2
x2+y2+2x+2y=11
5, xy+3y2-x+4y-7=0
2xy+y2-2x-2y+1=0
6, 4x2+4x-y2=-1
4x2-3xy+y2=1
7, x2-6y2-xy-2x+11y=3
x2+y2=5
8, xy2-2y+3x2=0
Y2+x2y+2x=0
9, x3+2xy2+12y=0
8y2+x2=12
10, 10x2+5y2-2xy-38x-6y+41=0
3x2-2y2+5xy-17x-6y+20=0