Add the algebraic expressions: `2/3a ,3/5a ,-6/5a`

Add the algebraic expressions: (2)/(3)a,(3)/(5)a,-(6)/(5)a

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

Add the algebraic expressions: 3a^2b ,-4a^2b ,9a^2b

Add the algebraic expressions: 3a^(2)b,-4a^(2)b,9a^(2)b

Add the algebraic expressions: 7/2x^3-1/2x^2+5/3,3/2x^3+7/4x^2-x+1/3,3/2x^2-5/2x-2

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

Add the algebraic expressions. 5ab^2 -5bc +8ca and 3ab^2 +6bc -4ca

Add the algebraic expressions. 3ab+6bc-4ca and 2ab-2bc+3ca

Add the algebraic expressions: (3)/(2)a-(5)/(4)b+(2)/(5)c,(2)/(3)a-(7)/(2)b+(7)/(2)c,(5)/(3)a+(5)/(3)a+(5)/(2)b-(5)/(4)c

If y=-3, find the value of the algebraic expressions: 5-y.