$$\int_0^5\left(x^2-5x\right)\ dx$$

$$-\int_0^5\left(x^2-5x\right)\ dx$$

$$\int_{-5}^{\ \ 5}\ \left(x^2-5x\right)\ dx$$

$$\int_a^bf\left(x\right)\ dx$$

$$\int_b^af\left(x\right)\ dx$$

$$\int_{ }^{ }f\left(x\right)\ dx$$

I have no idea

$$\int_1^7\left(x^2-6x-2\right)dx-\int_1^7\left(2x-9\right)dx$$

$$\int_1^7\left(2x-9\right)dx-\int_1^7\left(x^2-6x-2\right)dx$$

I have no idea