The third grade of Guangming Primary School planted 60 trees, the number of trees planted in the fourth grade was twice that of the third grade, and the number of trees planted in the fifth grade was 15 fewer than the total number of the third and fourth grades. How many trees are planted in fifth grade?
光明小学三年级植树60棵，四年级植的棵数是三年级的2倍，五年级植的棵数比三、四年级的总数少15棵．五年级植树多少棵？
<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<gadget id="calculator">60 - 15</gadget>
<output>45</output>

<gadget id="calculator">120 + 45</gadget>
<output>165</output>

<result>165</result>