#integration
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$y= [cosec(x^{2})]^{2}$ then $y'= 2cosec(x^{2})$×$-cosec(x^{2}).cot(x^{2}).2x$
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put the $cosec^{2}(x^{2})$ as $[cosec(x^{2})]^{2}$
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then use chain rule
along with if y= cosec(x) then $y'= -cosec(x).cot(x).\frac{d}{dx}x$
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