$\left(xy^2+x\right)dx+\left(yx^2+y\right)dy=0$

$\int sen^7\left(x\right)\cdot\cos^4\left(x\right)dx$

$3\left(n+6\right)$

$5\cdot56$

$\left(0.1\right)^2-2\left(0.1\right)^3$

$\frac{1}{\sin\left(b\right)^2}+\frac{\cos\left(b\right)\csc\left(b\right)}{\sin b}=\frac{1}{1-\cos b}$

$\int_2^2\left(\frac{2x+1}{\sqrt{x^2-1}}\right)dx$