表达式642: "x" squared plus "y" squared equals StartRoot, "x" squared plus "y" squared , EndRoot squaredx2+y2=x2+y22
642
表达式643: "y" equals left bracket, negative 3.3 2 , 3.3 2 , right bracket left brace, negative 4.9 7 5 less than "x" less than 4.8 5 , right bracey=−3.32,3.32−4.975<x<4.85
643
表达式644: "x" equals left bracket, negative 4.9 7 5 , 4.8 5 , right bracket left brace, negative 3.3 2 less than "y" less than 3.3 2 , right bracex=−4.975,4.85−3.32<y<3.32
