Find the difference. Express your answer in standard form.
$(2+8i)-(4-i)$

Simplify the given square root.

$\sqrt{-75}$

Identify the real and imaginary parts of each complex number.

$-4-9i$

Identify the real and imaginary parts of each complex number.

$3+2i\sqrt{3}$

Write the complex number in standard form.

$\frac{9+\sqrt{-16}}{3}$

Find the sum. Express your answer in standard form.

$5(4+7i)+6(3-2i)$