$\int\frac{1}{\left(x^3+x^2\right)}dx$
$\csc\left(x\right)=1,46$
$15\:-\:13\:-\:\left(6\:-\:8\right)$
$4x^2+y^2=16$
$\frac{x^2-3x+2}{2x+4}$
$\frac{3x+1}{7}-\frac{2-x}{3}\ge\frac{-5x-4}{14}+\frac{7x}{6}$
$sin2x-2sinx-3=0$
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