$a^2+3a-10$
$\left(9x^2+5y^2\right)\left(9x^2-5y^2\right)$
$\cot^2\left(x\right)=1.14$
$2x^2+4x-3=0$
$3\log\left(x\right)-\log\left(4\right)=4\log\left(2\right)$
$\left(-8\right).\left(\left(2\right)-5\right)$
$\frac{-8}{x}>4$
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