КР.Вариант5

#include <stdio.h>
#include <math.h>

int main() {
    double a, b, c, status = scanf("%lf%lf%lf", &a, &b, &c) == 3 && a < b && (b - a) / c == (int)((b - a) / c);

    for (double x = a; x <= b && status; x += c) {
        printf("%lf | ", x);
        if (x <= -10)
            printf("%lf", 1 / (2 + sin(2 * x)));
        else if (x <= -2)
            printf("%lf", exp(-2 * x) * pow(cos(x * x / 5), 2));
        else
            printf("%lf", (0.3 * x + 2) * sin(x / (x * x + 5)));

        printf("\n");
    }

    if (!status) printf("n/a");

    return 0;
}