Equation: 1+x^2*((1+y)*3)+5*(4+(4+3)) 

   +
  / \__________________
 1                     +
            __________/ \
           *             5
        __/ \__          5
       ^       +
      / \     / \__
     x   2   3     *
                  / \
                 y   3

Equation: ((4+c)*y)^(4+2)/5-s^200 

                       -
                    __/ \__
                   /       ^
                __/ \     / \
               ^     5   s   2
        ______/ \            0
       +         6           0
    __/ \__
   *       *
  / \     / \
 4   y   c   y

Equation: 2+2

 4