$\frac{\left(x^3+2x^2+x+5\right)}{\left(x+2\right)}$
$\cot^{2}x-\cos^{2}x$
$\left(-35+2.78\right).5.89$
$y^2+2cx+c^2=0$
$\frac{3x}{5}-7\ge\frac{-x}{2}+4$
$\frac{27}{9}$
$\left(6\:.10^3\right)\:+\left(3.2\:.\:10^4\right)$
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