If $x=-1, y=-1$, find the value of the following:

$x^2+y^2+xy$

If $x=-1, y=-1$, find the value of the following:

$3x^2+3y^2-3xy$

If $x=-1, y=-1$, find the value of the following:

$x^2+y^2-2xy$

Find the value of the following expression when $x=0, y=-2$,

$x^2+y^2+2xy$

Find the value of the following expression when $x=0, y=-2$,

$x^2-y^2$

Find the value of the following expression when $x=0, y=-2$,

$2x^2+2y^2-xy$

Find the value of the following expression when $x=0, y=-2$,

$x^2-xy+y^2$

Simplify the expression and find the value when $x=-2$

$3\left(x+5\right)-x-7$

Simplify the expression and find the value when $x=-2$

$x+5-2\left(x-5\right)$