Using a suitable identity,evaluate the following:
$103^{3}$

Give possible expressions for the length and breadth of a rectangle whose area is given as $(20 x^{2}+22 x+6)$ square units,where $(x > 0)$.

Classify the following as linear,quadratic,or cubic polynomial: $x^{3}+2x^{2}+3x+2$.

The value of the polynomial $5x - 4x^2 + 3$ when $x = -1$ is:

Expand $(a - 2b + 7c)^2$.

Factorise $12 x^{3} + 17 x^{2} + 3 x - 2$.