Regular expression to extract numbers from a string

Can somebody help me construct this regular expression, please...

Given the following strings...

• "April ( 123 widgets less 456 sprockets )"
• "May (789 widgets less 012 sprockets)"

I need a regular expression that will extract the two numbers from the text. The month name will vary. The brackets, "widgets less" and "sprockets" text are not expected to change between strings, however, it would be really useful if this text was able to be varied as well.