Solve left(x-yright)^30

$${ \left(x-y \right) }^{ 30 }$$

Expand

$$x^{30}[phone]x^{14}y^{16}-119759850x^{13}y^{17}[phone]x^{12}y^{18}-54627300x^{11}y^{19}[phone]x^{10}y^{20}-14307150x^{9}y^{21}+5852925x^{8}y^{22}-2035800x^{7}y^{23}+593775x^{6}y^{24}-142506x^{5}y^{25}+27405x^{4}y^{26}-4060x^{3}y^{27}+435x^{2}y^{28}-30xy^{29}+y^{30}[phone]y^{14}x^{16}-119759850y^{13}x^{17}[phone]y^{12}x^{18}-54627300y^{11}x^{19}[phone]y^{10}x^{20}-14307150y^{9}x^{21}+5852925y^{8}x^{22}-2035800y^{7}x^{23}+593775y^{6}x^{24}-142506y^{5}x^{25}+27405y^{4}x^{26}-4060y^{3}x^{27}+435y^{2}x^{28}-30yx^{29}-155117520\left(xy\right)^{15}$$

Evaluate

$$\left(x-y\right)^{30}$$