static double f ( double x , double y ) {
  double v = y - 2 * x * x + 1 ;
  return v ;
}

static double f ( double x , double y ) { double v = y - 2 * x * x + 1 ; return v ; }
(method_declaration (modifiers) type: (floating_point_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (floating_point_type) name: (identifier)) (formal_parameter type: (floating_point_type) name: (identifier))) body: (block (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (identifier))) right: (decimal_integer_literal)))) (return_statement (identifier))))