$-x^2+\frac{11}{2}+1$
$x^2+18x+77$
$y=7x^2-98x+343$
$\left(-5\right)\left(-3\right)\left(-2\right)$
$3\sin\left(5x\right)=2$
$-\frac{1}{\left(\infty+1\right)^2}$
$2 x ^ { 2 } + 3 x + 1 = 0$
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