1. y-a
2. - 4a-2p
3. 4k-3y+4a
4. a+p
5. a+5y
1. 2a-y-3a+2y = 2a-3a-y+2y = -a+y = y-a
2. a-5p-5a+3p = a-5a-5p+3p = -4a-2p = -2(2a+p)
3. 4k-4y+4a+y = 4k+4a-4y+y = 4k+4a-3y = 4(k+a)-3y
4. -p-k-a+2a+k = -k+k-a+2a-p = a-p
5. 3y-(-4a)+2y-3a= 3y+4a+2y-3a = 3y+2y+4a-3a = 5y+a
