I.- División

321.322.
\large 15x^{2}y^{3}:5\large -80ab^{2}:4
323.324.
\large -a^{5}:a^{3}\large x^{m}:-x^{n}
325.326.
\large 60x^{3}:12x^{2}\large -36a^{5}b^{3}:-9a^{3}b^{3}
327.328.
\large 28a^{m}:-7a^{m-3}\large 30a^{x}b^{y}:15a^{x-2}b^{y-1}
329.330.
\large 15x^{4}y^{3}c:5x^{2}y^{2}c\large 20a^{5}b^{2}c^{3}:4a^{3}b^{2}c
331.
\large 16a^{3}b^{2}x^{4}:-4a^{2}b^{2}x^{2}
332.
\large -20x^{3}y^{4}z^{2}:-5xy^{2}z
333.
\large 8a^{4}b^{3}c^{2}:4a^{2}b^{3}c^{4}
334.
\large -25x^{5}y^{3}z:15x^{3}y^{2}v
335.
\large \frac{3}{4}am^{2}n^{3}:\frac{2}{5}a^{2}mn
336.
\large 6x^{m}y^{n}:3x^{r}y^{s}
337.
\large (5a^{2}-4ab):a
338.
\large (6x^{3}y+8x^{2}y^{2}):x^{2}
339.
\large (15a^{2}b-10ab^{2}):5a
340.
\large (20xy^{2}+12x^{2}y^{3}):4xy^{2}
341.
\large (a^{m}+ba^{m-1}-b^{2}a^{m-2}):a^{3}
342.
\large 12a^{3}b-16a^{2}b^{2}+20ab^{3}:-4ab
343.
\large 25x^{4}y^{3}-10x^{5}y^{2}z-5x^{6}y^{4}+30x^{3}y^{3}x^{2}: \large 5x^{2}y
345.
\large 8a^{4}b-2a^{3}b^{2}+4a^{2}b^{2}:-4a^{2}b
346.
\large \frac{3}{5}x^{4}y-\frac{2}{3}x^{3}y^{2}+6x^{2}y^{3}-\frac{1}{2}xy^{4}:\frac{3}{2}xy
347.
\large \frac{5}{8}a^{2}b^{3}-0,6a^{3}b^{4}+\frac{3}{5}a^{4}b^{5}-\frac{1}{3}a^{5}b^{2}:\frac{3}{4}a^{2}b^{2}
349.
\large 12a^{2}-29ab+15b^{2}:3a-5b
350.
\large -9b^{2}+27b-20:3b-5
351.
\large 15a^{3}-25a^{2}b-9ab^{2}+15b^{3}:3a-5b
352.
\large -x^{4}y^{2}-2x^{2}y^{4}-y^{6}:x^{2}+y^{2}
353.
\large x^{5}-2x^{4}y+x^{3}y^{2}-x^{2}y^{3}+y^{5}:x^{2}+y^{2}
354.
\large 6x^{4}-5x^{2}y^{2}-6y^{4}:2x^{2}-3y^{2}
355.
\large 4x^{3}+4x^{2}-29x+21:2x-3
356.
\large a^{4}-9y^{2}a^{2}-6ayz^{2}-z^{4}:a^{2}-3ya-z^{2}
357.
\large 12ax^{5}-9a^{2}x^{4}+5a^{3}x:4ax^{2}-3a^{2}x
358.
\large x^{6}-2x^{3}y^{3}+y^{6}:x^{2}-xy+y^{2}
359.
\large 125a^{3}-8b^{3}:5a-2b
360.
\large 4b^{4}-9a^{2}b^{2}+6a^{3}b-a^{4}:2b^{2}-3ab+a^{2}
361.
\large x^{4}-x^{3}y+x^{2}y^{2}-xy^{3}:x^{2}+y^{2}
362.
\large x^{5}-2x^{4}y+x^{3}y^{2}-x^{2}y^{3}+y^{5}: \large x^{3}-2x^{2}y+y^{3}
363.
\large 2x^{4}-13x^{3}y+31x^{2}y^{2}-38xy^{3}+24y^{4}: \large x^{2}-5xy+6y^{2}
364.
\large a^{4}-4a^{3}b+6a^{2}b^{2}-4ab^{3}+4b^{4}: \large a^{3}-3a^{2}b+3ab^{2}-b^{3}
365.
\large a^{5}-b^{5}:a-b

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