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So I'm in enriched math and teacher asks us to draw the graph(sketch) of

$$(y^2-1)\sin\big(\cosh(x^3y)\big)=x^2-4$$

How to do it? :S

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    That is one weird "function " http://www.wolframalpha.com/input/?i=%28y%5E2-1%29*sin%28cosh%28x%5E3*y%29%29%3Dx%5E2-1%3B2012-10-14
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    Man, that thing is scary.2012-10-14

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enter image description here

Are you positive your teacher wasn't joking?

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    @Jean-Sébastien Sometimes, the ugliness of this world needs to be revealed.2012-10-14
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    I actually find it pretty. Well, some sort of disturbed pretty...2012-10-14
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    Based on this I'd guess the teacher wanted the students to use software to graph it, not work it out by hand. Maybe to prove a point, like "implicit functions can be complicated".2012-10-14