$\frac{x^2}{9}-6x+95$
$\left|\left(-4\right)\cdot7\right|$
$4t\left(1-t\right)+4t\left(1-t\right)$
$9x^2-25<0$
$3x^2-7x-1=0$
$\int\frac{5x^2+20x+6}{\left(x^2-x\right)\left(x^2+4\right)}dx$
$4x^4+4x^2+144$
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