static int calculateSeries ( int n ) {
  return 2 + ( n * n + n - 2 ) * factorial ( n + 1 ) ;
}

static int calculateSeries ( int n ) { return 2 + ( n * n + n - 2 ) * factorial ( n + 1 ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (binary_expression left: (decimal_integer_literal) right: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier)) right: (decimal_integer_literal))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))