Input:
d(d(sin(x),x,0.5),x,0.5)
Write:
`d(d(sin(x),x,0.5),x,0.5)`
Output:
$$\frac{d^{{0.5}}\frac{d^{{0.5}}sin(x)}{dx^{{0.5}}}}{dx^{{0.5}}}== cos(x)$$
Result: $$cos(x)$$
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