you can see in the Below image it’s a movable graph just scroll your mouse wheel on graph and then see in the search results after making a search for below line, so what you have to do to see this trick in action is go to Google.com and than and than make a search for below line: You Can Find many More similar more things on e computer notes
(sqrt(cos(x))*cos(200*x)+sqrt(abs(x))-0.7)*(4-x*x)^0.1, sqrt(9x^2),-sqrt(9-x^2) from -4.5 to 4.5
pass this trick to your friend and let her make search on Google and when she get this heart in front of her she will be impressed and you will dedicate your love.