With the right equations, you can do some pretty cool stuff on a graphing calculator, or in this case, WolframAlpha.  For Valentines Day, some math loving geeks decided to come up with some equations that would show make WolframAlpha plot some hearts with is graphing calculator capabilities.  Here are the formulas and results for those who want to share their love of math with their Valentine.

plot x^2 + (y-(x^2)^(1/3))^2,x=-1..1,y=-1..1.5

plot x^2+(y-(x^2)^(1/5))^2<1

For more formulas and pictures, check out this post from Geeks Are Sexy.