Vectors: operations

What is (2;3)+(7;9)

What is(-4;10)+(-2;7)?

Given vector a(-5;-4) and b(-1;9), find a+b.

Given vector a(-6;-5) and b(-2;9), find a-b.

Given vector a(5;-14) and b(-5;3), find a-b.

Given vector a(-3;4) , find 3a.

Given vector a(-1;7) and a+b(-10;9), find b.

Given vector a(-5;4) and a+b(-4;-3), find b.

Given vector a(5;10) and a-b(3;5), find b.

Given vector a(-1;6) and a-b(-10;9), find b.