Use the rule for order of operations to simplify the expression as much as possible:

`6+8(-2+6) =`

Use the rule for order of operations to simplify the expression as much as possible:

`8(-6+9) + 3(-3+4) =`

Use the rule for order of operations to simplify the expression as much as possible:

`6+(-15)-:5+4(9) =`