$1-x+x^2-\frac{x^3}{1+x}$
$2cosx\:=\:3tgx$
$2.92a+19.03>1.51$
$x^{-6}\cdot\:x^3\cdot x^5$
$\lim_{x\to2}\:\frac{\frac{1}{x-2}-\frac{1}{2}}{x}$
$x2\:+\:4x\:+\:10$
$\int_{-3}^3\left(\left(x^2-9\right)-\left(-x^2+9\right)\right)dx$
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