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• ㄱ.$\displaystyle \int _ {0} ^ {2 \pi} \int _ {0} ^ {2} \int _ {r} ^ {6-r^ {2}} r d z d r d \theta$
• ㄴ.$\displaystyle 4 \int _ {0} ^ {\frac{\pi} {2}} \int _ {0} ^ {2} \left (6 r-r^ {3} -r^ {2} \right) d r d \theta$
• ㄷ.$\displaystyle 2 \int _ {0} ^ {2} \int _ {- \sqrt {4-y^ {2}}} ^ {\sqrt {4-y^ {2}}} \int _ {\sqrt {x^ {2} +y^ {2}}} ^ {6-x^ {2} -y^ {2}} 1 d z d x d y$
• ㄹ.$\displaystyle 2 \int _ {-2} ^ {2} \int _ {0} ^ {\sqrt {4-x^ {2}}} 6-x^ {2} -y^ {2} - \sqrt {x^ {2} +y^ {2}} d y d x$