$$2-5^2+3\cdot14-5^2$$

$$\left|-1\right|\left|-1\right|$$

$$\left(-5x-1\right)^2$$

$$\left(-\frac{2}{11}a^{x+1}b^{x-3}c^2\right)\cdot\left(\frac{44}{7}a^{x-3}b^2\right)$$

$$\int\frac{2x^2+5x+16}{x^4+8x^2+16}dx$$

$$3^2+9x^4+4$$

$$50.6-800$$