Add the following
`-2a+5a^2-a^3+2, -5a^2 -2a^3 +4, a-a^2 +3a^3, -2a-3a^2-4, 6-3a+2a^2-2a^3`

Add the following 5a+2a^2-3a^3+8, -4a^2 +5a^3 -9, -2a+6a^2 -3a^3 , -a+4a^2 -9, 4-a-2a^2 +3a^3

Add the following : 2a, 3b and - 5c

Add the following 3a+6a^2b+4b,2b-9ab^2-6a,-6a-7b+2a^2b

Add the following expressions: (i) x^3-2x^2y+3x y^2-y^3,\ 2x^3-5x y^2+3x^2y-4y^3 (ii) a^2-2a^3b+3a b^3+4a^2b^2+3b^4,-2a^2-5a b^3+7a^3b-6a^2b^2+b^4

Verify the following : 3/4 + (-2)/5 = (-2)/5 + 3/4

Evaluate the following: |[1^2, 2^2, 3^2],[2^2, 3^2, 4^2],[3^2, 4^2, 5^2]|

2 - (5 - 3^3[4 -: 2 + 1]) =

Add the following expressions: 3n^(2)+5mn-6m^(2), 2m^(2)-3mn -4n^(2), 2mn-3m^(2)-7n^(2)

Multiply : 2a^(2) - 5a - 4 and -3a

Simplify : a^(2) - 2a + {5a^(2) - 3a - 4a^(2)}