Input:
sin(x)*x and d(sin(x)*x,x,2)
Write:
`sin(x)*x and d(sin(x)*x,x,2)`
Output:
$$sin(x)\ x\ and\ \frac{d^{{2}}sin(x)\ x}{dx^{{2}}}== sin(x)\ x\ and\ 2\ cos(x)-sin(x)\ x$$
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