Complex sentence: It comprised five platoons--motor transport, signals, mortar, machine-gun and anti-tank--and was equipped with eight 3 inch mortars, four Vickers machine guns and ten PIAT anti-tank projectors.
Split into simpler sentences: It comprised five platoons: motor transport, signals, mortar, machine-gun and anti-tank. With eight 3 inch mortars, four Vickers machine guns and ten PIAT anti-tank projectors.