Input:
dsolve(x(0.5,t)=x,y(0.5,t)=x-y)
Write:
`dsolve(x(0.5,t)=x,y(0.5,t)=x-y)`
Output:
$$dsolve(x^{(0.5)}(t)=x,y^{(0.5)}(t)=x - y)== x=2\ C_1\ exp(t), y=C_1\ exp(t)$$
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