2*x*cos(2*|x|)*sign(x) + sin(2*|x|)
$$2 x \cos{\left(2 \left|{x}\right| \right)} \operatorname{sign}{\left(x \right)} + \sin{\left(2 \left|{x}\right| \right)}$$
/ / 2 \\
4*\cos(2*|x|)*sign(x) - x*\sign (x)*sin(2*|x|) - DiracDelta(x)*cos(2*|x|)//
$$4 \left(- x \left(\sin{\left(2 \left|{x}\right| \right)} \operatorname{sign}^{2}{\left(x \right)} - \cos{\left(2 \left|{x}\right| \right)} \delta\left(x\right)\right) + \cos{\left(2 \left|{x}\right| \right)} \operatorname{sign}{\left(x \right)}\right)$$
/ / 3 \ 2 \
4*\- x*\-DiracDelta(x, 1)*cos(2*|x|) + 2*sign (x)*cos(2*|x|) + 6*DiracDelta(x)*sign(x)*sin(2*|x|)/ - 3*sign (x)*sin(2*|x|) + 3*DiracDelta(x)*cos(2*|x|)/
$$4 \left(- x \left(6 \sin{\left(2 \left|{x}\right| \right)} \delta\left(x\right) \operatorname{sign}{\left(x \right)} - \cos{\left(2 \left|{x}\right| \right)} \delta^{\left( 1 \right)}\left( x \right) + 2 \cos{\left(2 \left|{x}\right| \right)} \operatorname{sign}^{3}{\left(x \right)}\right) - 3 \sin{\left(2 \left|{x}\right| \right)} \operatorname{sign}^{2}{\left(x \right)} + 3 \cos{\left(2 \left|{x}\right| \right)} \delta\left(x\right)\right)$$