I.- Adición

90.
 
\large (3a^{2}b)+(a^{2}b)+(4a^{2}b)+ \large (2ab^{2})+(5ab^{2})
 
91.
 
\large (2a^{3}b)+(-5a^{2}b^{2})+(2b^{4})
 
92.
 
\large (5a)+(2x)4(-3a)+ \large (7a)+(-8x)
 
93.
 
\large (9ab^{2}c)+(\frac{5}{6}ab^{2}c)+ \large (\frac{7}{1}acb^{2})+(-b^{2}ca)
 
94.
 
\large (a+2b)+(2a-5b)
 
95.
 
\large (-4a+2b-c)+(a-b+c)+ \large (6a-5b-2c)+(a+b)
 
96.
 
\large (3x+2+6x)+(5y+3+8x)+ \large (5x-4+2y)
 
97.
 
\large (5a^{2}-b^{2})+(3a^{2}+2b^{2})+ \large (-9a^{2}+b^{2})
 
98.
 
\large (4a-3a^{2})+(-2a^{3}-3a)+ \large (-4a^{2}-a^{3})
 
99
 
\large (4a^{3}+2a^{2}b-b^{3}-3ab^{2})+ \large (7a^{3}-6a^{2}b+3ab^{2}+3b^{3})
 
100.
 
\large (3ab^{2}-2a^{2}b+4a^{2}b-2ab^{2})+ \large (6a^{2}b-3ab^{2}+3a^{2}b^{2})
 
101.
 
\large (x^{4}-2x)+(-x^{2}+x+1)+ \large (2x^{2}+x+2)
 
102.
 
\large (5a^{3}-9a^{2}b-ab^{2}+4b^{3})+ \large (-a^{3}+4a^{2}b-b^{3})+ \large (5a^{2}b-2ab^{2}-5b^{3})
 
103.
 
\large (3y^{2}z+4x^{2}y-5xyz)+ \large (7xyz-3y^{2}z+3v^{2})+ \large (3v^{2}s-6x^{2}y+5v^{2})
 
104.
 
\large (5x^{2}-7xyz+3xy^{2})+ \large (2y^{2}-5x^{3})+ \large (6xyz+5x^{3}-7x^{2}z+6xy^{2})+ \large (-5x^{4}+7z^{^{3}})
 
105.
 
\large (4x^{3}-6ax^{2}+7a^{2}b+3c^{2})+ \large (8x^{3}+15ax^{2}-6a^{2}b-9c^{2})+ \large (-9x^{3}-3a^{2}b+7c^{2}+8d^{3})+ \large (12ax^{2}-3a^{2}b-7d^{3})
 
106.
 
\large (3a^{4}-5a^{3}b+7a^{2}b^{2}+4ab^{3}-b^{4})+ \large (-2a^{4}-3a^{3}b+8a^{2}b^{2}+7ab^{3}+2b^{4})+ \large (6a^{4}-2a^{3}b-15a^{2}b^{2}-6ab^{3}-2b^{4})
 
107.
 
\large (4x^{2}y-8y^{3}+5y^{2}x)+ \large (4y^{3}-6xy^{2}+3x^{2}y)
 
108.
 
\large (5a^{2}b-8ab^{})+ \large (-12ab^{2}-15a^{2}b)+ \large (18a^{2}b+10ab^{2})
 
109.
 
\large (5a+8b)+ \large (6a-4b+10a^{2})+ \large (7b+3a-12b^{2})+ \large (-5a^{2}+2b^{2})
 
 110. 
   
 \large (6a^{3}b-8a^{2}b^{2}+15)+ \large (4a^{2}b^{2}-9a^{3}b-10)+ \large (5a^{3}b+3a^{2}b^{2}+12) 
   
 111. 
   
 \large (12x^{3}+3ax^{2}-bx+2c)+ \large (x^{3}-ax^{2}+3bx-c)+ \large (-2x^{3}-3ax^{2}+6bx+8c)+ \large (4x^{3}-5ax^{2}+2bx+c) 
   
 112. 
   
 \large (\frac{3}{4}a^{2}+a^{2}b^{2})+ \large (\frac{4}{5}a^{2}-3ab^{2})+ \large (-7ab^{2}-\frac{1}{10}a^{2}) 
   
 113. 
   
 \large (\frac{2}{3}x^{2}y+\frac{3}{5}xy^{2}+5y^{3})+ \large (\frac{1}{4}x^{2}y-\frac{1}{2}xy^{2}-6y^{3}) 
   
 114. 
   
 \large (3a^{2}-\frac{2}{5}ab+\frac{1}{2}b^{2})+ \large (2ab-\frac{2}{3}a^{2}+4b^{2})+ \large (-3b^{2}+\frac{3}{4}ab+\frac{2}{5}a^{2}) 
   
 115. 
   
 \large (\frac{1}{2}x^{3}-8x^{2}y+\frac{1}{4}xy^{2}-5y^{3})+ \large (4x^{3}+\frac{5}{3}x^{2}y-3xy^{2}+\frac{2}{5}y^{3})+ \large (\frac{3}{4}x^{2}y+\frac{8}{3}y^{3}+\frac{3}{2}xy^{2}-\frac{7}{2}x^{3}) 
   
 116. 
   
 \large (\frac{5}{2}a^{3}b^{2}-\frac{7}{3}a^{2}b^{3}+\frac{3}{4}ab^{4})+ \large (4x^{3}+\frac{5}{3}x^{2}y-3xy^{2}+\frac{2}{5}y^{3})+ \large (\frac{7}{6}ab^{4}-\frac{4}{3}a^{3}b^{2}+\frac{4}{5}a^{2}b^{3}) 
   
 117. 
   
 \large (3-\sqrt[3]{ab}+x^{2}-\sqrt{y})+ \large (4x^{2}-8+2\sqrt{y}-3\sqrt[3]{ab})+ \large (-3\sqrt{y}+5\sqrt[3]{ab}+12-6x^{2}) 
   

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