1、r=a( 1-sinθ).

It is said that this is the content of Descartes' last love letter, which contains an unforgettable secret.

2 、( x2+y2)- 16*abs(x)*y=225 .

This function is a heart diagram.

3、X2+(y+3√X2)2= 1 .

Draw a function image, which is a heart.

4、Y= 1/X、X2+Y2=9、Y=│-2X│、X=-3│Sin Y│.

Drawing functional diagrams should also be alive.

5、 128√e986。

Wipe off about half. If you don't, I love you.

6.r=a( 1-cosθ) or r = a (1+cos θ) (a > 0) Horizontal direction.

Heart line.

7、x2+(y-3√x2)2= 1 .

A love is formed on the number axis, which is the exclusive "love curve" of the Department of Mathematics.