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Input:
sin(x and x)
Write:
`sin(x and x)`
Compute:
$$\frac{d}{dx} sin(vector(x,x))$$
Output:
$$\frac{d}{dx} sin(vector(x,x))== cos(vector(x,x))\ vector(1,1)$$
Result: $$cos(vector(x,x))\ vector(1,1)$$
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