Xiao Min used to have some stamps, but this year he collected 28 stamps. After giving 35 stamps to Xiao Ling, there are 42 stamps left. How many stamps did Xiao Min originally have?
小敏原来有一些邮票，今年又收集了28枚，送给小玲35枚后，还剩下42枚．小敏原来有多少枚邮票．
<gadget id="calculator">35 - 28</gadget>
<output>7</output>

<gadget id="calculator">42 + 7</gadget>
<output>49</output>

<result>49</result>