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• 23 Matrix to power $2012$
• 15 How to find area of triangle from its medians
• 14 Integration exercise: $ \int \frac{e^{5x}}{ (e^{2x} - e^x - 20) }dx$
• 10 calculate $x^{206}+x^{200}+x^{90}+x^{84}+x^{18}+x^{12}+x^{6}+1$ given $(x+x^{-1})^2 = 3$
• 9 How to solve $e^{ix} = i$
• 7 Vectors that form a triangle!
• 6 Find the value of $x^3-x^{-3}$ given that $x^2+x^{-2} = 83$
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