
1) 5a+2a=7a
2) 6b-4b=2b
3) 2x+7x-5x=4x
4) 3y-y-4y+8y=6y
5) 4a-5b-2a-3b=2a-8b
6) 7x2-6x-5x2+3x=(2x-3)x
7) 6x+5-8y-3+5y-4x=2x+2-3y
8) 5ab-4a+6b+8a-2b+3ab=8ab+4a+4b
9) 6a+7b-5c-4b+2a+c-5b-6a+2c=2a-2b-c
10) 5m-9+3n-7m+4n+4-5n-3m= -5m-5+2n
11) 8-7a-6ab+5b+10a+4ab-4a-11b-3=5-a-2ab+6b
12) 4x-6y-8+3z-1x-7z+5y-2+16x=19x-y-4z-10

1) 5a-(2a+3b)=3a-3b
2) 7x-(4x-2y)=3x+2y
3) 4y-(y-3) =3y+3
4) 9m+(6-7m) =2m+6
5) (3a2-5a)-(a²-4a)=3a2-5a-a²+4a=2a2+a
6) 5b+(-3b-2c)+(b+4c)=9b+2c
7) (3k-6n)+(-2k+6n)=k
8) (4x+3)+(7-2x)=2x+10
9) (10x3-4x²)-(2x²-5x³)=15x3+6x2
10) 5a3b2-9b4-(3a3b²-4b4)=2a3b2+13b4


1) 2a+5b=8-15= -7
2) 4m-3n+10= -20-24+10= -34
3) 5x+2y-3z+7=30-34-9+7= -6
4) 2ab-3bc-4ac=8x(-4)-6×9-16×12= -278
5) 3x-4y+xy-46= -6-24-2x(-6)-46= -48

1) a3×а5=а8
2) b7×b2=b9
3) (-m2)×m4= -m6
4) (-x2)×(-x6)=x8
5) y5×(-y6)= -y11
6) c2×c5×c4=c11
7) pn×p2=p2n
8) am×a4=a4m
9) xn×xk×x3=xn+k+3
10) yn+2×y3= yn+5
11) z2n+3×zn-5=z2n-2
12) bm-4×b7-2m=b-2m+4

1) (x+2)×5=5x+10
2) 6×(3y-4)=18y-24
3) (2m+3n)×7=14m+21n
4) c×(2a+5b)=2ac+5bc
5) -4a(3b-2a)= -12sb+8a2
6) (-5x+3y)×2x= -10x2+6xy
7) (3a-4b+5c)×(-2)= -6a+8b-10c
8) x3(x2+x-2)=x5+x4-2x3
9) (3y2+4y-1)×(-5y6)= -15y8-20y7+5y6
10) 4a3 (2a2-5a-3)=8a5-20a3– 4a3
11) (-4z5+2z2-10z)×2z3=-8z8+4z5-20z4
12) (-6x3y2)(4x5-5y4)=-24x8y2+30x3y6

1) (x+2)(x-3)=x2-x-6
2) (5x+1)(2x+4)=10x2+22x+4
3) (3b+2)(4-b)= -3b2+10b+8
4) (2y-5)(4y-3)=8y2-26y+15
5) (3a+4)(2a-3)=6a2-a-12
6) (7z-3)(5z-2)=35z2-29z+6
7) (2-4x)(1-3x)=12x2-10x+2
8) (3-2x)(5x+1)= -10x2+13x+3
9) (4b-5c)(3b+4c)= 12b2+bc-20c2

1) (a3)2=a6
2) (x2)4=x8
3) (-y4)3= -y12
4) (-x5)4=x20
5) (-c8)5= -c40
6) (x3)7=x21
7) (-y15)3= -y45
8) (b6)2=b12
9) (z3)n=z3n
10) (yk)5=y5k
