Does anyone know equivalent expressions for these: y+4t+5y+3(3t+9y) and 9(y+4y+5)​

1) Use the method of undetermined coefficients to find one solution of

y''-9y'+y=7e9t.

2) Find a particular solution to the differential equation -3y''2y'+1y=1t2-2t-3e^3t.

3) Find a particular solution to y''+4y'+4y=?6.5e?2t.

4) Find a particular solution to the differential equation y''-2y'-15y=450t3.

5) Find a particular solution to y''+5y'+6y=19te5t.

6) Find the solution of

y''-3y'-4y=36e5t

with y(0)=2 and y?(0)=9.

7) Find the solution of

y''+7y'=392sin(7t)+784cos(7t)

with y(0)=9 and y?(0)=8.

8)  Find a particular solution to

y''+36y=12sin(6t).

9)  Find y as a function of x if

y'''-10y''+24y'=30e^x,

y(0)=20,  y?(0)=22,  y??(0)=29.

Step-by-step explanation:

y + 4t + 5y + 3 (3t + 9y) = 13t + 33y

9 (y + 4y + 5)​ = 45y + 45

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction