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5+(5x ((5+5+5×5):5+5))×5=300

Răspuns :

[tex]
5+(5*((5+5+5*5):5+5))*5=\\
=5+(5*((10+25):5+5))*5=\\
=5+(5*(35:5+5))*5=\\
=5+(5*(7+5))*5=\\
=5+(5*12)*5=\\
=5+60*5=5+300=305[/tex]