$$\left(7-c\right)^2$$

$$\int\sqrt[6]{x^5}dx$$

$$4b\cos\left(2x\right)+4c\sin\left(2x\right)$$

$$36x^{14}-1$$

$$\left(-25\right).\left(+1\right).\left(-2\right)$$

$$\lim_{x\to1}\left(\sqrt{1-x}\right)$$

$$\frac{x^3+3x^2-9x-18}{x^2-9}$$