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diff((sin(x)%20*%20x%5E2)%20/%20(1%20%2B%20tan(cot(x))))
diff((sin(x)%20*%20x%5E2)%20/%20(1%20%2B%20tan(cot(x))))
diff ((sin (Symbol ('x' ))%Integer (20 )*% Integer (20 )*Symbol ('x' )%Float ('5E2' ))%Integer (20 )/%Integer (20 )*(Integer (1 )%Integer (20 )%Integer (2 )*Symbol ('B' )%Integer (20 )*tan (cot (Symbol ('x' )))))
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