$z^2+16z$
$cos2a+6cos^2a=1$
$\lim_{x\to\infty}\left(\frac{x^4}{12x^3+128}\right)$
$\frac{2x+8x^3}{x^2+2x^4}$
$\int\frac{3x^2-7x+1}{\left(x-2\right)\left(x^2+2x+5\right)}dx$
$\:-46\:+\:1$
$5m\cdot2n$
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