Complex sentence: He accepted Mbeki's request to improvise explosive devices for the newly formed Umkhonto we Sizwe (MK), and experimented with substances such as nitric acid, potassium permanganate, magnesium, glycerol and icing sugar.
Split into simpler sentences: He accepted Mbeki's request to improvise explosive devices for the newly formed Umkhonto we Sizwe (MK). He experimented with substances such as nitric acid, potassium permanganate, magnesium, glycerol and icing sugar.