Onde encontro o "ou exclusivo matematico" no writer

aquele que tem um + com um circulo ao redor
aguardo resposta
atenciosamente

Using Google Translate: https://translate.google.com/ it looks like Portuguese:

Title: where do I find the “exclusive or mathematical” in writer

Text body: one that has a + with a circle around awaiting reply regards

If I understand correctly user would like to insert mathematical character with plus sign inside a circle.