Упростите выражение:
- $${\largeа)}\ (2x-2a)(3a^2-4a+5);$$
- $${\largeб)}\ (7x^2-2x+4-x^2)(2x-x-1);$$
- $${\largeв)}\ (x^2+3x-2)(2x^2-x+4);$$
- $${\largeг)}\ (2m^3-7m^2+4m)(3-8m+m^2);$$
- $${\largeд)}\ (2a+1)(3+a)(5a+2);$$
- $${\largeе)}\ (x-3)(2x-1)(7+2x);$$
- $${\largeж)}\ (2m-n)(3n+2m)(m-5n);$$
- $${\largeз)}\ (p-8q)(4q-p)(p+8q).$$