$x^4-2x^3+5x-1\left(x-2\right)$
$2^{-\infty}$
$-5x^3\cdot\left(x^2-3x+1\right)$
$\left(a+b\right)^2\:+2\left(a+b\right)\left(c+d\right)\:+\:\left(c+d\right)^2$
$\int3sen^2\left(\frac{bx}{c}\right)dx$
$\lim_{x\to\infty}\left(4-\frac{3x}{x+5}\right)^{x^2}$
$2x^{2}-4x+2=0$
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