2) (3x + 2)(x + 1) 4) (dc + c ² )(c - 1) 2) (y+3)(y+1)
4) (x + 2)(y - 1)
6) (a + x)(a - y)
8) (a - b)(- a - b)
2) (y² + c)(y² + 3c)
4) (2a + b²)(2b - a²)
6) (b + 2a)(b - 2a)
2) (y + 3)(y² - 3y - 3)
4) (y² + c)(y + 3c + c²)
2) (y+2)(y² -2y+4)
4) (c - d²)(c²+ cd² + d⁴)

at our lessons we answer the teacher's questions.

in england they don't go to school every day.

i do my homework in my bedroom.

the pupils on duty tidy the classroom.

all the pupils have to wear uniforms.

i come to school at a quarter to eight.

we like to make reports.

i do me homework every day.

i have my music lessons two times a week.

we have english three times a week.

this magazine is published to times a month.

i visit my aunt three times a month.

i never miss classes.

i go to the forest very often.

they seldom go to the theatre.

i don't want to answer the teacher's questions.

my friends and i  go to school every day.

i do my homework at school.

every friday the students tidy their classrooms.

we don't have to wear a uniform  at our school.

as a rule they  come to school at 8 a.m.

my sister like to make reports on geography.

we must do washing up every day.

i have to play chess two times a week.

we go to a swimming pool three times a week.

my mother goes to the dentist two times a month.

i go to the disco three times a month.

i have never been to volgograd.

she goes to the cinema very often.

they seldom sing and dance.