$3x^2+4x+1=0$
$\log\left(3x+7\right)=0$
$\frac{\sin\left(x\right)}{1-\cos^2\left(x\right)}$
$-11+2x^4-3x^3-3x^4+2x^2+1$
$\sin^2\left(x\right)-4=0$
$a=2;b=5;c=-3;d=-1;f=0$
$2x^2-4x-3$
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