Simplify the following expression and find its value for $\mathrm{x}=2$ and $\mathrm{y}=-2$.

$\left(-2+\mathrm{x}\right)-4\left(2+\mathrm{y}\right)$

Simplify the following expression and find its value for $\mathrm{x}=2$ and $\mathrm{y}=-2$.

$3\mathrm{x}-4\mathrm{y}+15-\mathrm{x}+5\mathrm{y}-11$

Write the following statement as a formula.

The perimeter of a square (P) is $4$ times the length of its side (a).

Write the following statement as a formula.

The sum of the four angles $(\mathrm{a}, \mathrm{b}, \mathrm{c}, \mathrm{d})$ of a quadrilateral is ${360}^{°}$.

Write the following statement as a formula.

The area (A) of a parallelogram is the product of its base (b) and height (h). 

Write the following statement as a formula.

The area (A) of a triangle is equal to half of the product of its base (b) and height (h).