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/usr/lib/open-axiom/input/gnarly1.input is in open-axiom-test 1.5.0~svn3056+ds-1.

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draw(surface(cos(t)/(1+sin(t)**2),sin(t)*cos(t)*cos(u)/(1+sin(t)**2),
     sin(t)*cos(t)*sin(u)/(1+sin(t)**2)),t = -%pi..%pi,u = 0..%pi)