题目

My father is an old man aged 70. He is a wonderful, intelligent man of old 41 . He does not compromise his values for anything. Like many older Americans he is struggling to find his 42 in this world as a retiree.  He has crossed many items off his “bucket list (遗愿清单)”. He has 43every challenging mountain from Colorado to North Carolina, lived in the 44out west for several months, swum in many oceans, obtained a pilot’s 45 , and is now planning to hike the Appalachian Trail.  My father worked for more than 40 years 46 a construction supervisor and his work led to 计算：（1）（﹣2）11+（﹣2）9+（﹣ ）﹣3﹣（3.14﹣π）0（2）5x2y+（﹣ ）3xy2 ．