17.3) 5x^17:x^13-16x^4=5*-1^17:-1^13-16*-1^4=-5:-1-16=5-16=-11
-33y^6:y^4+37y^2=-33y^2+37y^2=-33*0,25+37*0,25=8,25+9,25=17,5
15z^9:z^6-160z^3=15z^3-160z^3=15*-0,125-160*-0,125=-1,875+20=18,125
250t^8:t^5+6t^3=250t^3+6t^3=250*-64t+6*-64t=-16000t-384t=-16384t
17.4) 0,07a^8b^4:a^7+0,03a^2b^6:(ab^2)=0,07a^1b^4+0,03ab^4=0,07*7*16+0,03*7*16=7,84+3,36=11,2
2,5x^4y:x^5-2,6x^10*y:x=2,5x^-1-2,6x^9*y=2,5*-1-2,6*-1*10=-2,5+26=23,5