public static int sumOfSeries ( int n ) {
  int x = ( n * ( n + 1 ) / 2 ) ;
  return x * x ;
}

public static int sumOfSeries ( int n ) { int x = ( n * ( n + 1 ) / 2 ) ; return x * x ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal))))) (return_statement (binary_expression left: (identifier) right: (identifier)))))