$8x^2+2x-1$
$\left(2cosx-\sqrt{3}\right)\left(cotx+1\right)=0$
$\left(-3\right)-\left(-16\right):\left(+8\right)$
$\frac{10x^{2}-90}{x^{2}+4x+3}$
$\int_0^{10.125}\left(\pi\right)dx$
$2x-2\sqrt{3x^2}+2$
$5-4\ln\left(x\right)=7$
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