`1.` 2 * x * x - 5 * x + 1 = 0
`2.` (1 + x * x) * (sqrt(x - 1))
`3.` (sqrt(3 * x * x + 1)) * (abs(x - 3))
`4.` (2 * x * x - 5 * x + 2) / (1 - (2 * x * x * x) / (2 * x * x))
`5.` 2 * (sqrt(x * x - 1)) * (3 * y - 2)
`6.` (sqr(sin(x)) + sqr(cos(x)) + 2 * sin(x) * cos(x)) / (1 / 2 * sqrt(sqr(sin(3 * x)) + sqr(cos(3 * x)))
`7.` (2 * x * x + 4 * x + 1) ** (1 / 3) + (x * x + 2 * x + 1) / ((x + y + x * x + y * y + 1) / (2 * x * y * z))
`8.` (abs(3 * x - 1) * (2 * x + 1) ** (1 / 5)) / (cos(x) + sin(x))
`9.` (3 * x * x + 4 * x + 1) / (x + y) < 2 * x * x + 3 * x
`10.` (x + y) / (x - y)
`11.` 2 * x * x + 1 + (3 * x * x + 4 * x) / (2 * x * x * x + 3 * x) <= abs(x - 5)
`12.` (3 * cos(2 * x) + 1) * sqrt(sqr(sin(x)) + 2 * sin(x) * cos(x) + sqr(cos(x))) / (3 * sin(x) * cos(x))
`13.` exp(y) + 5 ** (2 * x + 5) * cos(3 * x)
`14.` (x * x + y * y > z * z) and (x >= y)
`15.` abs(sin(pi * x / 2)) < 1 / 2
`16.` (x * x + y * y + 2 * x * y) / (2 * x + 3 * y + (x * x + 4 * x + 1) / (2 * y * y + 3 * x * y))
`17.` x * x * x + sqr(log10(x * x * x * x + 2)) - sqrt(x - 4)
