math

+oo
 |^ sin(ax) sin(bx)         (pi)a
 |  --------------- dx  =   ----- ,   if a < b
 |          2                 2
^          x
 0

__          ____
| \ 1      / pi
|   - =   / ---
|   2   \/   2

          mathemagician
 
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      ___________________   ___________________
  .-/|  78   ~~**~~      \ /      ~~**~~   79  |\-.
  ||||                    :                    ||||
  ||||   Dorothy asked    :   The Scarecrow    |...

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