en­vmath – Maths com­mands and en­vi­ron­ments

The pack­age of­fers a group of ams­math-like en­vi­ron­ments: – Equa­tion, which is the stan­dard equa­tion en­vi­ron­ment, with an op­tional ar­gu­ment for a la­bel name; – Mul­ti­line, which is broadly sim­i­lar to the ams­math mult­line en­vi­ron­ment, cre­at­ing a pleas­ing lay­out for equa­tions that run over sev­eral lines; – Sys­tem, for group­ing a set of equa­tions to­gether within a left brace, with only one equa­tion num­ber; and – EqSys­tem, sim­i­lar to Sys­tem, ex­cept that each equa­tion has its own num­ber.
All the en­vi­ron­ments have ‘*’ forms, which don't gen­er­ate equa­tion num­bers.
The pack­age also works on the stan­dard maths en­vi­ron­ments.
The pack­age is part of the bo­si­sio bun­dle.