Bài 1 Tính
a\(\left\{315-\left[(60-41)^2-361\right].4217\right\}+2885\)
b\(\left[(46-32)^2\right]-\left[(54-42)^2\right].36-1872\)
c\(\left\{\left[126-(36-31)^2.2\right]-9\right\}.101\)
Bài 2 Tính
a) \(-(a+b-c+d)+(a-b-c-d)\)
b) \(a(b-c-d)-a(b+c-d)\)
c) \(-(a-b)-(c-d)+(a+b)+c-d\)
Giúp mình nho