1. ๒(x2+7x+1) / (2x+1)(x+2)2 dx = ๒(-1/(2x+1) + 1/(x+2) + 3/(x+2)2)dx
2. x / (x2+1) เป็นฟังก์ชันคี่ ดังนั้น -ฅ๒ฅx / (x2+1) dx = 0
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The difference between school and life?
In school, you're taught a lesson and then given a test.
In life, you're given a test that teaches you a lesson.
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