$$0.56+-2.9$$

$$x\cdot6\:=48$$

$$\int x\:ctg\:\left(x^2+\:1\right)dx$$

$$8\sin\left(x\right)=2$$

$$\left(3x^2y^3+2\right)^2$$

$$\frac{tana}{seca}-\frac{seca-cosa}{tana}=0$$

$$\int\left(\frac{1}{4x^4}-\sqrt{2x}\right)dx$$