He could have simplified that whole thing with a smile is a frown upside down 
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I know...surprised you understood it actually
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Ouch. I was just teasing.
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Oh well then OK
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Your father’s a math magician?
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what happens when ya turn it ninety degrees?
@SarahKSilverman (:
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Wow, my dad said the same thing. Are you like my long lost brother. If so, can I get a loan?
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in Australia, they smile upside down.
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My father used to say a smile is just another sad and useless parabola full of crushing regret and existing now only to pass on a litany of neuroses to his offspring. And now I suck at math.
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You mean a hyperbola = smile... Parabola = frown
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*sigh* math
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Sent this to my daughter, who responded with... “Is the frown expressed by an elliptical equation? if so, the points at which the frown turns down are the foci, expressed by (x-h)^2 (y-k)^2 ________ + _______ a^2 b^2 where c^2= +- √a^2+b^2”
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Or a reflection over the x-axis.
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Fair assumption though.
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