How to get second derivative in symblolic toolbox?

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my expretion = cos(x*t^2)+x^2+4*t^3); how to get second derivative by t?
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Andriy Kavetsky
Andriy Kavetsky on 8 Oct 2016
You should determine x and t as syms x t and use diff command diff(cos(x*t^2)+x^2+4*t^3),t,2); t, 2 means second derivative by t.

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Andriy Kavetsky
Andriy Kavetsky on 8 Oct 2016
You should determine x and t as syms x t and use diff command diff(cos(x*t^2)+x^2+4*t^3),t,2); t, 2 means second derivative by t.

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