$$\int\frac{2x+3}{\sqrt{x^2+2x+5}}dx$$

$$\frac{1+\sin\left(x\right)^2.\cos\left(x\right)}{\sin\left(x\right)^2.\cos\left(x\right)}$$

$$\left(4p^3q^4-4\right)^2$$

$$3x\:+\:6\:=\:x^2$$

$$-\int tan\left(3x\right)dx$$

$$x^{2+8x+4}$$

$$975+859$$