n(n+1)÷2-n(n+1)÷2ए नाइन प्लस वन बाय टू माइनस इन इंडिया एंड प्लस वन बाय टू
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0
Step-by-step explanation:
both equations are same so answer of the both will also be same
if you subtract same number form itself then the answer is 0.
Hope it helps
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