Solving 30 plus and minus problems of positive and negative numbers Example: 13-15 + (- 12) - (- 13) Such questions Trouble

Solving 30 plus and minus problems of positive and negative numbers Example: 13-15 + (- 12) - (- 13) Such questions Trouble

4-9-21+3435-4-34+(-8)14+(-12)+(-7)-(-21)-45+46-(-23)+(-12)29-31-2+(-3)-11+42-33+(-43)-42+14+(-48)-(-14)45+27+(-36)-3747+(-3)-29+302-28-17+(-39)13+8+(-36)-325+2-(-40)+(-9)-24+(-32)-27+23-29+6-(-37)+(-4...