Do orally

Find remainder when the expression ( $2018^{2018}$ -1)( $2018^{2018}$ )( $2018^{2018} +1$ ) + ( $2019^{2019}$ )( $2019^{2019} +1$ )( $2019^{2019} +2$ ) + ( $2020^{2020} +1$ )( $2020^{2020} +2$ )( $2020^{2020} +3$ ). Is divided by 6