Question 907832
There are no restrictions on the domains.
x : ({{{-infinity}}},{{{infinity}}})
y : ({{{-infinity}}},{{{infinity}}})
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{{{f(x,y)=xe^y-ye^x}}}
{{{f(1,-1)=1e^(-1)-(-1)e^1}}}
{{{f(1,-1)=e^(-1)+e}}}
{{{f(1,-1)=1/e+e}}}
{{{highlight_green(f(1,-1)=(1+e^2)/e)}}}