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3rd/3ways: sum Show 1+2+3+...+n = n(1+n)/2
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1st/2ways: exp e^g(x) (g'(x)f(x) + f'(x)) dx
logic: contradiction p∧¬p
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MAJOR - Season 2 Episode 21 (tagalog dubbed
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1st/2 ways: derivative y=(ln(x))^x