Simplify each of the following and express it in the form $a+ib$:

$2\left(3+4i\right)+i\left(5-6i\right)$

Simplify each of the following and express it in the form $a+ib$:

$\left(3+\sqrt{-16}\right)-\left(4-\sqrt{-9}\right)$

If the following complex form $\left(-5+6i\right)-\left(-2+i\right)$ is expressed in the form of $a+ib$, then find $a+b$.

If the following complex form $\left(8-4i\right)-\left(-3+5i\right)$ is expressed in the form $a+ib$, then find $a-b$.

Simplify each of the following and express it in the form $a+ib$:

${\left(1-i\right)}^2\left(1+i\right)-{\left(3-4i\right)}^2$

Simplify each of the following and express it in the form $a+ib$:

$\left(5+\sqrt{-3}\right)\left(5-\sqrt{-3}\right)$

Simplify each of the following and express it in the form $a+ib$:

$\left(3+4i\right)\left(2-3i\right)$

$(-2+\sqrt{-3})(-3+2\sqrt{-3})$ is expressed as $a-7i\sqrt{3}$.Write the value of $a$.

$(2+\sqrt{-3}{)}^2$ in expressed as $a+4i\sqrt{3}$. write the value of $a$.