Lauren sent 65 pieces of mail on Monday, 10 more pieces of mail on Tuesday than on Monday, 5 fewer on Wednesday than on Tuesday, and 15 more pieces of mail on Thursday than on Wednesday. How many pieces of mail did Lauren send?
Lauren sent 65 + 10 = 
<gadget id="calculator">65+10</gadget>
<output>75</output>
75 pieces of mail on Tuesday.
He sent 75 - 5 = 
<gadget id="calculator">75-5</gadget>
<output>70</output>
70 pieces of mail on Wednesday.
And sent 70 + 15 = 
<gadget id="calculator">70+15</gadget>
<output>85</output>
85 pieces of mail on Thursday.
Therefore, he sent 65 + 75 + 70 + 85 = 
<gadget id="calculator">65+75+70+85</gadget>
<output>295</output>
295 pieces of mail.

<result>295</result>