Question

3-{2+(11-15)-[5+(3+1)]+8}

Answer 1

3-{2+(11-15)-[5+(-3+1)]+8}

3-{2+(-4)-[5+(-2)]+8}

3-{2-4-[5-2]+8}

3-{2-4-3+8}

3-{2-7+8}

3-{2+1}

3-3

0