static int countStr ( int n ) {
  return 1 + ( n * 2 ) + ( n * ( ( n * n ) - 1 ) / 2 ) ;
}

static int countStr ( int n ) { return 1 + ( n * 2 ) + ( n * ( ( n * n ) - 1 ) / 2 ) ; }
(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: (binary_expression left: (decimal_integer_literal) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) right: (decimal_integer_literal)))))))