Complex sentence: He entered St John's College, Oxford at age 17, but found lectures "awful"; working independently, Wolfram published a widely cited paper on heavy quark production at age 18 and nine other papers, before leaving in 1978 without graduating.
Split into simpler sentences: He entered St John's College, Oxford at age 17 but found lectures "awful". Working independently, Wolfram published a widely cited paper on heavy quark production at age 18 and nine other papers before leaving in 1978 without graduating.