The math homework

Plot
This is the 2nd episode of phineas and ferb, they got their first math homework assignment, each time phineas struggles he now goes to isabella, after he finished his work he made a merry go round in the backyard, which made it the first time i put in a perry and doof scene to add extra parts to my phineas and ferb episodes. this time they ended up getting busted because of what doof was doing didn't affect their invention.

Allusions

 * spongebob squarepants-once phineas got to work, he was using an exact line from the spongebob episode named ¨procrastinations¨. also the butt shattering from doof is from the spongebob episode named ¨I had an accident¨, which premiered 16 years prior to this phineas and ferb episode.