# Systems of differential equations

Display solutions of the ordinary differential equation

$y_1'= f_1(x,y_1,y_2)$
$y_2'= f_2(x,y_1,y_2)$

with initial values $(x_0,y_1)$, $(x_0,y_2)$.

f1(x,y1,y2)=
f2(x,y1,y2)=