Информатика 7 класс Паскаль
2.
3(x-2)+2(4-x) = 3*(x-2)+2*(4-x)
4x^3-y^2 = 4*power(x,3)-sqr(x)
2a+b/3(b) = (2*a+b)/(3*sqrt(b))
3.
2(a-b) = 2*(a-b)
(a+b)(c+d) = (a+b)*(c+d)
2(c)/c-2d = (2*sqrt(c))/c-2*d