#### ABSTRACT ALGEBRA-18

Proposed by Marian Ursarescu-Romania ABSTRACT ALGEBRA-18 Solution 1 by Florentin Visescu-Romania, Solution 2 by Julio Cesar Monhsham-Pelotas-Brazil

#### ABSTRACT ALGEBRA-17

Proposed by Marian Ursarescu-Romania ABSTRACT ALGEBRA-17 Solution by Florentin Visescu-Romania

#### ABSTRACT ALGEBRA-16

Proposed by Marian Ursarescu-Romania ABSTRACT ALGEBRA-16 Solution by Florentin Visescu-Romania

#### AMAZING IDENTITY-53

Proposed by Marian Ursarescu-Romania AMAZING IDENTITY-53 Solution by Remus Florin Stanca-Romania

#### SOLUTION UP280-RMM WINTER EDITION 2020

Proposed by D.M.Batinetu-Giurgiu, Neculai Stanciu-Romania SOLUTION UP280 Solution by Marian Ursarescu-Romania

#### SOLUTION UP257-RMM AUTUMN EDITION 2020

Proposed by Marian Ursarescu-Romania SOLUTION UP257 Solution by proposer

#### SOLUTION SP259-RMM AUTUMN EDITION 2020

Proposed by Marian Ursarescu-Romania SOLUTION SP259 Solution by proposer

#### SOLUTION SP257-RMM AUTUMN EDITION 2020

Proposed by Marian Ursarescu-Romania SOLUTION SP257 Solution by proposer

#### COMPLEX NUMBERS-21

Proposed by Marian Ursarescu-Romania COMPLEX NUMBERS-21 Solution by Khaled Abd Imouti-Damascus-Syria

#### SOLUTION SP258-RMM AUTUMN EDITION 2020

Proposed by Marian Ursarescu-Romania SOLUTION SP258 Solution by Tran Hong-Dong Thap-Vietnam