Question

-(t-s-(-a))+(-n+p)

 m-(x-p+m)

 

(a+b)-(a-b)

Answer 1

-(t-s-(-a))+(-n+p)=-t+s-a-n+p

 m-(x-p+m)=m-x+p-m=p-x

 

(a+b)-(a-b)=a+b-a+b=2b