Question: Help with int(Dirac)

> R := 1000*Dirac(x-10):

int(R, x = 0 .. 10);

500

we have result to be 500

I define a function of time t and variable x

> p := piecewise(0 <= t and x < 10, R, 10 <= t and t < 20, 0):

int(p, x = 0 .. 10);

 

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How to show result in a form belowing

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