Complex numbers, roots of equation, cubic equations.

[STEP III 2005 Question 6 (Pure)]

Sum, identity, definition.

[STEP III 1996 Question 1 (Pure)]

Simultaneous equations, root of equation, iterative root finding.

[STEP III 1993 Question 7 (Pure)]

Sum, series, polynomial, Chebyshev's polynomial (hyperbolic).

[STEP III 1989 Question 5 (Pure)]