2 How to solve a first order ODE?

Solve \( y'(x)=1+2 x\) for \(y(x)\)

from sympy import * 
x   = symbols('x') 
y   = Function('y') 
ode = Eq(Derivative(y(x),x),1+2*x) 
sol = dsolve(ode,y(x)) 
#    Eq(y(x), C1 + x**2 + x) 
checkodesol(ode,sol) 
#    (True, 0) 
if checkodesol(ode,sol)[0]==True: 
   print ('verified solution OK')