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syms x y1 y2 y3 y4;
y1=diff(besselj(1,x),x);
y2=diff(bessely(1,0.383*x),x);
y3=diff(besselj(1,0.383*x),x);
y4=diff(bessely(1,x),x);
x=solve('y1*y2-y3*y4','x');
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