The same derivative for very different functions Just a curiosity and request for a comment on this. d/(dx)(-2 log (u x-2))=-(2 (x u'))/(u x-2) d/(dx)(-2 log (2-u x))=-(2 (x u'))/(u x-2) What can be said about such results? Clearly there is nothing similar between ux−2 and 2−ux, yet the equations are both the same. Checked with Mathematica and by simple manual computation. Maybe the differentiated functions can be derived one from another?

$\frac{20b}{{\left(4b^3\right)}^3}$

Which operation could we perform in order to find the number of milliseconds in a year??
${\displaystyle 60\cdot 60\cdot 24\cdot 7\cdot 365}$
${\displaystyle 1000\cdot 60\cdot 60\cdot 24\cdot 365}$
${\displaystyle 24\cdot 60\cdot 100\cdot 7\cdot 52}$
${\displaystyle 1000\cdot 60\cdot 24\cdot 7\cdot 52?}$

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A) No
B) 0
C) Yes
D) 6

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149600000000 is equal to
A)$1.496\times <!--\; \times \; -->{10}^{11}$
B)$1.496\times <!--\; \times \; -->{10}^{10}$
C)$1.496\times <!--\; \times \; -->{10}^{12}$
D)$1.496\times <!--\; \times \; -->{10}^8$

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simplify ${\displaystyle \sqrt{125n}}$

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