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 May22 asked Choice of numbers in calculating $\lim_{x\rightarrow 0}\frac{e^{2x}-1}{\sin 3x}$ May14 asked Primitive function of $x^3 \sin x^2$ May12 asked $\frac{(x + \sqrt{x}) - (x-\sqrt{x})}{\sqrt{x+\sqrt{x}}+\sqrt{x-\sqrt{x}}} = \frac{2}{\sqrt{1+\frac{1}{\sqrt{x}}}+\sqrt{1-\frac{1}{\sqrt{x}}}}$? Jan21 asked How come $\int_{-\infty}^\infty \! e^{-|t|} \, \mathrm{d} t = 2\int_{0}^\infty \! e^{-|t|} \, \mathrm{d} t$? Jan20 asked What is the limit of $\frac{e^{6x}-2e^{3x} + 1}{x^2}$, as $x \rightarrow 0$? Jan20 answered What is the limit of $\frac{e^{6x}-2e^{3x} + 1}{x^2}$, as $x \rightarrow 0$? Jan19 asked Approaching infinity with volume of turning body Jan2 asked Why is $\frac{(x-1)+2}{(x-1)(x+1)} = \frac{1}{x-1}$? Jan2 answered Why is $\frac{(x-1)+2}{(x-1)(x+1)} = \frac{1}{x-1}$? Sep25 answered Finding correlation in plotted graph Sep17 asked Finding correlation in plotted graph Sep16 asked Finding correlation through plotting logarithms Sep13 asked Found one root, how do I know to keep searching or not? Sep13 asked Finding $\alpha$ for $\sin(4 \alpha + \frac{\pi}{6}) = \sin (2\alpha + \frac{\pi}{5})$ Sep13 asked $\sin 4\alpha = 2\sin 2\alpha \times \cos 2\alpha$? Sep13 asked Two unrelated equations, $w^2 = -\frac{15}{4} - 2i$ and $z^2 - (3-4i)z + (2-4i) = 0$? Sep12 asked Calculate $\cos(v+\frac{\pi}{6})$ when $\cos v = -\frac{2}{3}$ Sep10 asked Finding highest possible value of function Aug30 asked Calculating the chess problem, sum $\sum_{k=0}^{63}2^{k}$ Aug26 asked Calculate absolute values with unknown constant