Padma is trading cards with Robert. Padma started with 75 cards and traded 2 or her valuable ones for 10 of Robert's cards. Robert started with 88 of his own cards and traded another 8 of his cards for 15 of Padma's cards. How many cards were traded between both Padma and Robert?
Padma traded 2 + 15 of her cards = 
<gadget id="calculator">2+15</gadget>
<output>17</output>
17 cards.
Robert traded 10 + 8 of his cards = 
<gadget id="calculator">10+8</gadget>
<output>18</output>
18 cards.
In total, between both of them Padma and Robert traded 17 + 18 = 
<gadget id="calculator">17+18</gadget>
<output>35</output>
35 cards.

<result>35</result>