DNS servers update fail.

Each script to add static IP from different internet providers in DNS separately work, but

/ip dns set servers=[[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] primary-dns];[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] secondary-dns]]
/ip dns set servers=[[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] primary-dns];[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] secondary-dns]]

If I combine both script in one, nothing work. Any ideas?

/ip dns set servers=[[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] primary-dns];[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] secondary-dns];[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] primary-dns];[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] secondary-dns]]

Round brackets and coma:
/ip dns set servers=(
[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] primary-dns],
[/ip dhcp-client get [/ip dhcp-client find interface=Livas-gateway] secondary-dns],
[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] primary-dns],
[/ip dhcp-client get [/ip dhcp-client find interface=LTC-gateway] secondary-dns]
)

Thanx, working…