$4x^2-3x-1$
$3x^2+15x-3=0$
$25m^2+110m+100$
$\frac{1-\sin\left(x\right)}{\cos\left(x\right)}=\frac{1+\cos\left(x\right)}{\cos\left(x\right)}$
$1-\sin=\cos$
$7x+9x+3x+x$
$\left(a^2+3b-6\right)\left(3a^2-5b+8\right)$
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