$$\int\frac{\sqrt{4x^2+25}}{2x}dx$$

$$2y+12=80$$

$$25-9\cdot2+3$$

$$3y+y'=6\cdot\left(1+\frac{x}{2}\right)$$

$$x^3\:-\:14^2\:-\:49x$$

$$\left(3\sqrt{7\:}a^{x+1}b^m-\frac{1}{5}b^{-7}c^{-2}\right)\left(3\sqrt{7\:}a^{x+1}b^m+\frac{1}{5}b^{-7}c^{-2}\right)$$

$$x^{4+x^{3-x-1}}$$