Question: Question and answer both removed

Given my gender, my age, the region where I live, statistics say my life expectation is still 25.3 years, thus about 221650 hours.
Under these conditions, what does the loss of an hour to answer a question represent?
Practicaly nothing, particularly if the answer does present some interest for the OP who posted it.

But what if this same OP has removed his question once I answered it?

In this case it's a complete waste of time, without even complaining about the indelicacy that this PO has shown.

So, vv, why did you remove your last question once answered ?

As a reminder, it was a manual simplification (Maple did not succeed in doing so) of  expression

expr := 512*b^9 + (2303*a + 2304)*b^8 + (4616*a^2 + 9216*a + 4608)*b^7 + (5348*a^3 + 16128*a^2 + 16128*a + 5376)*b^6
 + (4088*a^4 + 16128*a^3 + 24192*a^2 + 16128*a + 4032)*b^5 + (1946*a^5 + 10080*a^4 + 20160*a^3 + 20160*a^2 
+ 10080*a + 2016)*b^4 + (728*a^6 + 4032*a^5 + 10080*a^4 + 13440*a^3 + 10080*a^2 + 4032*a + 672)*b^3 
+ (116*a^7 + 1008*a^6 + 3024*a^5 + 5040*a^4 + 5040*a^3 + 3024*a^2 + 1008*a + 144)*b^2 
+ (26*a^8 + 144*a^7 + 504*a^6 + 1008*a^5 + 1260*a^4 + 1008*a^3 + 504*a^2 + 144*a + 18)*b + 9*a^8 
+ 36*a^7 + 84*a^6 + 126*a^5 + 126*a^4 + 84*a^3 + 36*a^2 + 9*a + 1

in order to obtain (a+2*b+1)^9 - a*(a-b)^8