Question

1)(m+n)-(m-1)=?
2)(x-y)+(x-y)-(2x+y)=?
3)(0,2x-3)-(x-2)-(0,4x-1)

Answer 1

1)....=m+n-m+1= n+1
2)...=x-y+x-y-2x-y=-3y
3)....=0,2x-3-x+2-0,4x+1=-1,2x