Search for a minimum of Easom's function
 F(X1,X2) = -cos(X1)*cos(X2)*exp(-(X1-pi)^2 - (X2-pi)^2)
from the starting point with coordinates X1=2, X2=2. 
The search is unconstrained.
The function has a minimum at X1=pi, X2=pi. Value of the function in this minimum is equal to -1.
See details at http://www.chem-astu.ru/science/opt/eindex.shtml

# Code of the optimized function:
  - cos({1}) * cos({2}) * exp(-pow({1}-pi,2) - pow({2}-pi,2))
# Type of the optimization (1 - search for a maximum,  -1 - search for a minimum):
 -1 
# Boundaries (on left and right) and starting point coordinates (middle) separated by comma. If a boundary is absent, a comma MUST BE PRESENT.
, 2 , 
, 2 ,