Terms for subject Mathematics containing or function

English	Russian
if the function f is a polynomial or a rational function then f is continouos wherever it is defined	повсюду, где она определёна
if the function f is a polynomial or a rational function then f is continuous wherever it is defined	повсюду, где она определена
these quasilinear equations take the general form of 1 or 2, but have coefficients which are also functions of x	общего вида