а) sqrt( (12*x + power(x,4)) / (x*x+sqrt(234 + z)) )

б) 20 * power(cos(x), 3) / sqrt(abs(2*x) - 5*x + 23*z)

в) power(1 - tan(x), -tan(x)) + cos(x-y)

г) (3 + power(x, y-1)) / (1 + x*x * abs(y - tan(x)))

д) abs(y - sqrt(abs(x)) * (x - y / (x + x*x / 4)))