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Use the rule for order of operations to simplify the expression as much as possible:
`1+5(-5+9) =`
`1+5(-5+9) =`
21
Use the rule for order of operations to simplify the expression as much as possible:
`9(-3+5) + 2(-3+10) =`
`9(-3+5) + 2(-3+10) =`
32
Use the rule for order of operations to simplify the expression as much as possible:
`-6+(-6)-:2+3(-4) =`
`-6+(-6)-:2+3(-4) =`
-21