The curve |x2|−(3√33−7)112x2−3+√1−(||x|−2|−1)2−y=0 looks like: ... 1.5-. 5*abs(x))*sqrt(abs(abs(x)-1)/(abs(x)-1))-(6*sqrt(10)/14)*sqrt(4-(abs(x)-1)^2)-y); ... (x/7)^2*SQRT(ABS(ABS(x)-3)/(ABS(x)-3))+(y/3)^2\*SQRT(ABS(y+3*SQRT(33)/7 )/( ...