



 
Hi Patrick, I don't know what $x, y$ and $z$ are but I am going to assume they are numbers. You have a new operation, asterisk, that works as follows. To "asterisk" two numbers you add the two numbers and then add 1. Look at 1) $x*(y*z).$ You do what is inside the parentheses first, $y*z,$ which, according to the "asterisk" rule is $y + z + 1.$ So now you have $x*(y + z + 1).$ According to the "asterisk" rule you are to add $x$ to $(y + z + 1)$ and then add $1.$ Thus $x*(y + z + 1) = x+(y + z + 1) + 1.$ I hope this helps,  


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