Use symbols and abbreviations to save time. 

Be consistent with their use!

Have a play with some examples of commonly used abbreviations and what they stand for.   
1 e.g. (exempli gratia)- example     
2 c.f. (confer) - compare     
3 i.e. (id est)- that is     
4 no. (numero) - number     
5 etc. (et cetera) - and so on

Please, refer to the image below for a list of commonly used symbols.

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