Differential equations are equations containing functions y = f(x), g(x) and derivatives of y with respect to x.

Order of a differential equation is defined as the order of the highest order derivative of the dependent variable present in the differential equation.

The power or index of the highest ordered derivative in the polynomial is the degree of the differential equation provided equation is in the standard form.

Since the equation has 2nd derivative as the highest derivative term.hence the order 2

Since the highest derivative term is hence the order is 3.

the power of the highest order derivative i.e . is 2.hence the degree 2

Order = 3 ,Since the highest order derivative is but degree cannot be defined ,because the deriative term y’ is present in exponential form.

Order = 4 , degree not defined , because the function y’’’ present in the angle of sine function.

Order = 1 , degree = 1. Since the equation has the highest derivative as y' and its power is 1

Order = 2 , degree = 1.Since the equation has as the highest derivative term.its order is 2 and its index is 1