This is known as the Leibniz integral rule. Two, the change of order of partial derivatives. And, Three, the change of order of integration.”“Always got to beat us,” Mai said, rolling her eyes. The Chinese girl had glasses perched on her round face, her black hair falling about her face.“You could let one of us answer,” Deborah said. She wore her brown hair short, a functional bob about her face. Neither of them wore makeup. None of us wanted to be stopped by Officer Lance and get a cum-facial for wearing too much.“Excellent,” he said. “Now, what does that mean?” He pulled down a whiteboard to cover another. “Why are these three methods interchangeable and when should we use which?”I shot my hand up again, a big grin on my face. My two friends did, too.Phones chirped around the room. People gasped as they pulled them out. “Clara's new tweet.” I burst into giggles. “Yay! New tweet!”Mr. Jackson gave me a strange look. “Uh, did you have an answer?”“Nope,” I said, grinning at him.“Your. I hope to be more careful in my spelling and grammar, I apologise in advance if it isn’t perfect..I was about 12 when my dad bought an Alsatian to help look after his pigeons which were his pride and joy, rebel stayed in dads pigeon loft for some weeks so we hardly ever seen him. I asked my dad if I could go with him to see the pigeons as it had been a while since I had done so, dad was happy enough to take me as he knew I showed a keen interest in his birds. We arrived about lunch time, and dad had a few sandwiches and a flask of tea for us to eat in the afternoon. He opened the padlocked door to his pigeon loft and we walked in, there were feathers everywhere, rebel had been to get to the pigeons and had some success with about six of them, dad went crazy, he grabbed rebel by the collar and shook him hard, he put his lead on and shouted that’s fucking enough that’s the last he will harm my birds, I took it he meant to put the dog down. I said to dad, don’t kill him dad, let.
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