Differential equation of driven oscillations of an object of mass $m$ is

$m\frac{d^{2}u}{d{t}^2}+cu+b(\frac{du}{dt}{)}^3=$Psin$(t)$

where $m=1kg,c=5\mathrm{.}3k\frac{g}{s^2},b=0\mathrm{.}7k\frac{g}{s},P=14N,=2\mathrm{.}1s^{-1}.$ Initial conditions:

$u_0=0m,v_0=-0\mathrm{.}5\frac{m}{s}.$ Draw the Displacement vs Time graph and Velocity vs Time graph for the object. to solve please use mathcad