$f\left(x\right)=-3x^{2}+4x-1$
$\left(5x^a\right)\left(x^a\right)$
$\left(6x+5\right)\left(x^3-2\right)$
$2x^2+3x+5\:x$
$\frac{2\tan\left(b\right)}{1+\tan^2\left(b\right)}$
$\int\frac{x-1}{\sqrt{4x^2-8x+3}}dx$
$\left(-3+6\right).\left(-7+5\right).\left(9+10\right)$
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