||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

{
y=function('y',x)
print 'question'
DE=diff(y,x,2)+4*y-8*x*x
print DE
print 'answer'
var('y,k,A,B')
k=2*x*x-1
f=A*cos(2*x)+B*sin(2*x)
f=f+k
print f

}
{
var('c1,c2')
y=function('y',x)
print 'question'
DE=diff(y,x,2)-3*diff(y,x)+2*y-exp(x)
print DE
print 'answer'
f=c1*exp(x)+c2*exp(2*x)-x*exp(x)
print f
}

 * '''Solution by''': 
   * <YASHWANTH>, <STUDENT>, <SNIST>
   * <SRI LAKSHMI>,<STUDENT>, <SNIST>