2) X^2=XY ; Multiply both sides by X

3) X^2-Y^2=XY-Y^2 ; Subtract Y^2 from both sides

4) (X+Y)(X-Y)=Y(X-Y) ; Factor

5) X+Y=Y ; Cancel out (X-Y) term

6) 2Y=Y ; Substitute X for Y, by equation 1

7) 2=1 ; Divide both sides by Y

-- "Omni", proof that 2 equals 1

- 1) X=Y ; Given
2) X^2=XY

Multiply both sides by X 3) X^2-Y^2=XY-Y^2... - If A equals success, then the formula is: A = X + Y + Z
X is work.

Y is play. Z is keep your mouth shut. EINSTEIN... - If A equals success, then the formula is:
A = X + Y + Z
Where X is work, Y is play and Z is keep your mouth shut.

-- Albert Einstei... - If A equals success, then the formula is _A = _X + _Y + _Z.

_X is work. _Y is play. _Z is keep your mouth shut. -- Albert Einstei... - winged comments n.
Comments set on the same line as code,
as opposed to boxed comments.

In C, for example: d = sqrt(x*x + y*y); /* distance from origin */ Generally these refer only to the action(s) taken on that line.... - Are you sure (Y/Y)?
- define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255) #define BX_(x) ((x) - (((x)>>1)&0x77777777) \ - (((x)>>2)&0x33333333) \ - (((x)>>3)&0x11111111)) -- Count the number of bits in a word.