Expression 11: 3 times left bracket, left parenthesis, negative sin "x" , right parenthesis times StartFraction, 1 Over "e" Superscript, "x" , Baseline , EndFraction plus cos left parenthesis, "x" , right parenthesis times "e" Superscript, negative "x" , Baseline times StartFraction, "d" Over "d" "x" , EndFraction left parenthesis, negative "x" , right parenthesis , right bracket plus 3cosine left parenthesis, "x" , right parenthesis3·−sinx·1ex+cosx·e−x·ddx−x+3cosx
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Expression 12: 3 times left bracket, negative StartFraction, sin "x" Over "e" Superscript, "x" , Baseline , EndFraction plus cos left parenthesis, "x" , right parenthesis times StartFraction, 1 Over "e" Superscript, "x" , Baseline , EndFraction times left parenthesis, negative 1 , right parenthesis , right bracket plus 3cosine "x"3·−sinxex+cosx·1ex·−1+3cosx
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Expression 13: 3 times left bracket, negative StartFraction, sin "x" Over "e" Superscript, "x" , Baseline , EndFraction minus StartFraction, cos "x" Over "e" Superscript, "x" , Baseline , EndFraction , right bracket plus 3cosine "x"3·−sinxex−cosxex+3cosx
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Expression 14: 3 left parenthesis, cos "x" minus StartFraction, sin "x" plus cos "x" Over "e" Superscript, "x" , Baseline , EndFraction , right parenthesis3cosx−sinx+cosxex