private static double f ( double P , double x ) {
  return x + P / Math . pow ( 2 , x / 1.5 ) ;
}

private static double f ( double P , double x ) { return x + P / Math . pow ( 2 , x / 1.5 ) ; }
(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 (return_statement (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_floating_point_literal)))))))))