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Input:
dsolve(y(1,x)=acos(y)-sin(x)-x)
Write:
`dsolve(y(1,x)=acos(y)-sin(x)-x)`
Compute:
$$dsolve(y^{(1)}(x)=acos(y) - sin(x) - x)$$
Output:
$$dsolve(y^{(1)}(x)=acos(y) - sin(x) - x)== cos(x)$$
Result: $$cos(x)$$
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