Louise mowed a neighbor's yard to earn $25. She mowed a few more yards and earned an additional $75. She
 continued to mow all of the yards each week for a total of 5 weeks, earning money at the same rate. At the end
 of the 5 weeks, she spent $250.
 Write a numerical expression with parentheses for the amount of money Louise has left
 Do not simplify your expression,
 I need help ASAP