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 Mar15 revised Prove that there exists a choice of $\pm$ signs deleted 4 characters in body Feb5 revised Find one solution for system of inequalities (if exits) deleted 194 characters in body Feb5 revised Find one solution for system of inequalities (if exits) deleted 160 characters in body Feb4 revised Find one solution for system of inequalities (if exits) added 154 characters in body Feb4 revised Find one solution for system of inequalities (if exits) edited body Feb4 revised How to prove/dispute the following log inequality? added 14 characters in body Jan29 revised Diffusion of a chemical species inside a Y-shaped tube edited tags Jan29 revised How to prove/dispute the following log inequality? added 47 characters in body Jan27 revised Diffusion of a chemical species inside a Y-shaped tube edited tags Jan27 revised Diffusion of a chemical species inside a Y-shaped tube added 367 characters in body Nov14 revised Finding an angle between side and a segment from specified point inside an equilateral triangle added 28 characters in body Nov13 revised How find this maximum of this $(1-x)(1-y)(10-8x)(10-8y)$ added 269 characters in body Nov11 revised Translational invariance and zero eigenvalue added 35 characters in body; edited tags Nov11 revised How find this maximum of this $(1-x)(1-y)(10-8x)(10-8y)$ deleted 171 characters in body Nov11 revised How find this maximum of this $(1-x)(1-y)(10-8x)(10-8y)$ deleted 1 character in body Nov11 revised How find this maximum of this $(1-x)(1-y)(10-8x)(10-8y)$ deleted 1 character in body May27 revised Show $\dfrac{x_1}{x_n} + \dfrac{x_2}{x_{n-1}} + \dfrac{x_3}{x_{n-2}} + \dots + \dfrac{x_n}{x_1} \geq n$ added 36 characters in body May4 revised How prove this $T_{n}<\dfrac{5}{4}|b_{1}|$ added 10 characters in body May4 revised How to show the following inequality? added 72 characters in body Apr24 revised Find the maximum value of $T=\frac{2}{3}(\cos 2A-\cos 2B)-\tan\frac{C}{2}$ added 139 characters in body