There are three members of Yaya's family, plus Yaya's cousin, the combined age of the four people is 95 years old this year. Dad is 4 years older than mother, and Yaya is 3 years older than her cousin. Eight years ago, the sum of their ages was 65 years old. So how old is dad this year?
丫丫一家3口，加上丫丫的表弟，今年四人年龄之和为95岁．爸爸比妈妈大4岁，丫丫比表弟大3岁.8年前，他们的年龄之和为65岁．则爸爸今年多少岁．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">95 - 32</gadget>
<output>63</output>

<gadget id="calculator">65 - 63</gadget>
<output>2</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 3</gadget>
<output>9</output>

<gadget id="calculator">95 - 9 - 6</gadget>
<output>80</output>

<gadget id="calculator">80 + 4</gadget>
<output>84</output>

<gadget id="calculator">84 / 2</gadget>
<output>42</output>

<result>42</result>