Simplify the following text for a Grade 5 native English-speaking person.
Original: Bernard FrÃ nicle de Bessy ( c. 1605 â `` 1675 ) , was a French mathematician born in Paris , who wrote numerous mathematical papers , mainly in number theory and combinatorics .
Simplified: Bernard FrÃ nicle de Bessy ( about 1605 â `` 1675 ) , was a French mathematician . He was born in Paris .