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narutooo3
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yahoo
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What Would Crayon Shin-chan Do If He Had Doraemon?
omepiece6
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umaru7
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Sword Of Coming 2 剑来2(Jian Lai 2) The Swords
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chidori5
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2nd/2ways: add math sum a + (a+d) + (a+2d) + ... + (a+(n-1)d) ?
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UC Davis: differentiate y=(3x+1)^2
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2 ways: 𝖎𝖓𝖙𝖊𝖌𝖗𝖆𝖑 ∫3x/((x-2)(x+1)) dx
Why the mean of AP is the median of AP? mean=median?
umaru4
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trig integral ∫1/(sin(ax) cos(ax)) dx
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There are 2 lines. One line has 3 points & the other line has 6 points.
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1st/2ways: add math sum a + (a+d) + (a+2d) + ... + (a+(n-1)d) ?
5th/5ways: triangular num: Show t(n-1) + tn = n^2 where tn = nth triangular number
yui is love4
5 ways: trig derivative tan(x).
UC Davis #10: count prove Σi = n(n+1)/2 where i=1 to n
sum Find 1/1.4 + 1/4.7 +1/7.10+... +1/((3n-2)(3n+1))