Simplify the following expressions :
`2/3 (2a-b) +1/2 (a-2b+c) - 1/3 c `

Simplify the following expressions : 2/3 (3a+ 6b ) - 5a - 2/5 b

Simplify the following expressions : 1/2 (a - 3b) - 2/3 (1/4 a - 4/3b)

Add the following algebraic expressions : 2a - 3b + 4c , -3a + 2b - 5c , 7a - c and 3b + 6c

Simplify the following 3.6a^(3)b^(2)c div 1.2 ab^(2)c^(3)

Find the values of each of the following expressions for a=1,\ b=2\ a n d\ c=-1. (i) a^2+b^2+2a b (ii) 2a^2-b^2c+3a b c

Find the values of each of the following expressions for a=1,\ b=2\ a n d\ c=-1. (i) a^3+b^3+c^3-3a b c (ii) a^2+b^2+c^2-a b-b c-c a

Simplify and find the value of the following expression when a=3 and b=1: 4(a^2+b^2+2a b)-[4(a^2+b^2-2a b)-{-b^3+4(a-3)}]

Add the following expressions using horizontal method : 2a + 3b +4c and 3a+ 4b + 2c

Simplify each of the following algebraic expressions by removing grouping symbols. 1. a-[b-{a-(b-1)+3a}] 2. a-[2b-{3a-(2b-3c)}]

Simplify each of the following algebraic expressions by removing grouping symbols. 1. a-[a+{a+b-2a-(a-2b)}-b] 2. 2x-3y-[3x-2y-{x-z-(x-2y)}]