2. Definition: $a \odot b=a \times b+(a-b)$, then $(3 \odot 2) \odot 4=(\quad)$
【Analysis】Define a new operation with parentheses, first remove the parentheses $3 \odot 2=3 \times 2+(3-2)=7, 7 \odot 4=7 \times 4+(7-4)=31$.