<span>a)(x²-3y)²=x^4-6x^2y+9y^2
б)</span><span>(2а²+⅓b³)²=4a^4+(4/3)(a^2)(b^3)+(1/9)b^6
в)</span><span>(x²-2y)(x²+2y)=x^4-4y^2
г)</span><span>(3x-y)(y+3x)=9x^2-y^2</span>
Children went to school yesterday.
When did you clean your teeth?
1 is
2 doesn`t pay
3 will phone
<span>4 Will you help me if I have a problem?
5 go
6 don't pay
7arrives
8 what will you say
9 will call
10 won`t wait
11 misses
12 is
13 won't be happy
14 am
15 goes
16 rings
17 will be
18 feels
19 doesn`t come
20 goes out</span>
1 nobody, 2 anything, anyone, 3 anybody, someone, anything, nothing. 5 everybody, everything.
в 5 по смыслу подходит так, но в задании нет этих слов. можно написать somebody, something, но смысл тогда искажается.