eludy $-$ da $=0,$ y$(0)=-1.$

$($B$)$ Solve the following initial value problems $($IVP$)$ with separable equations:

$y-x{y}^{\text{'}}=3-2x^2{y}^{\text{'}},y(1)=-3.$

$y^{\text{'}}(1-x^2)+xy=2x,y(0)=4.$

$|)dy-dx=0,y(0)=-1.$

$y^{\text{'}}=y^{3}sinx,y(0)=-2.$