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Sun Yuqiang's lost road book, we'll find it for him today.
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Solve the following differential equation cos^2(x)dy/dx +y = tan(x)
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Alternate way: Find 1+2+3+... +(n-1)+n via "polynomial degree 2"
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MP 2000 Hindustan: Evaluate ∫(tan(x)+cot(x))^2 dx
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AI 2008 Hindustan: Evaluate integral ∫ 2/3 cos(x)/sin^2(x) dx
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Review: Linear form, Quadratic form & Bilinear form
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2 ways: sq root derivative 1/(√√(1/√x))
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Let DeepSeek help me DIY a PC—wondering if it's reliable?!
Homemade Automatic Fur-Plucking Machine
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See how the British speak to get your tutor to reply instantly!
The principle behind the continuous chestnut shelling "gadget" I made last time is here! A craftsman
Finish time in 30 seconds
Are there really so many Chinese families that can't afford 50,000 yuan?
One clever misdirection trick to leave your nitpicky boss with nothing to criticize!
How to Come Up with Your Startup Idea in 48 Seconds
How many builds did they watch before editing this ridiculously staged footage?
Compared to carpooling passengers, I'd rather trust the reviews from ride-hailing drivers.
Can domestically produced outdoor saws really deliver?
The Ming Thirteen Tombs' Treasured Masterpiece: the "Golden Filigree Crown"
The comment section photography season is officially open! It took eight hours to create—everyone, c