How to handle symbolic polynomials?

Hi, im looking for a way to create a function that takes an integer (k) and a simple but large symbolic polynomial like this :

1+x²+x³+x⁴.......

and returns only the part of the polynomial with a degree lower or equal to the integer k, can this be done?

for example

p= (syms) 1+x²+x³+x⁴+x⁶+x⁹

return=function(p,5)

return= (syms) 1+x²+x³+x⁴

Answer 1

[Walter Roberson]

sym2poly(), take the last k+1 entries, poly2sym()

Or use coeffs('all') with two outputs, and take the last k+1 entries of the two outputs, dot product the two (that is, sum of the element-wise multiplications)