$$\int\frac{5x+6}{\left(x-1\right)\left(x+4\right)}dx$$

$$x^2>2-x^2$$

$$26\cdot26$$

$$\left(-2xy^2\right)\cdot4xy^2$$

$$4\left(k+9\right)$$

$$\left(60a+10b-9c+d-4\right)-\left(a+100b-6c+8d-9\right)$$