What is this contourplot?

Question:What is this contourplot?

Posted: Markiyan Hirnyk 7759 Product: Maple

January 14 2016

Here is my unsuccessful try

>restart; plots:-contourplot(exp(2*x/(x^2+y^2)), x = -2 .. 2, y = -2 .. 2,
grid = [100, 100], coloring = [blue, red], contours = [.1, .3, .5, 1, 2]);

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