Expand & simplify

Expand and simplify: $4(4x+5)+5(3x-8)$

Simplify: $(3x)^{3}$

Expand and simplify: $(2x+9)(3x+3)$

Write in its simplest form: $\sqrt[3]{512x^{3}}$

Simplify: $(4x)^{2}$

Simplify: $(4x^{2})^{2}$

Expand: $-6(x-2)$

Write in its simplest form: $\sqrt[3]{64x^{6}}$

Factorise fully: $4x^{2}+9x$

Simplify: $\sqrt{4x^{2}}$

Expand: $-6(6x-6)$

Simplify: $(3x)^{2}$