$y=-x^2+4x+1$
$12x^2-7x+1$
$\sin\left(2a\right)=\cos\left(a\right)$
$5^2-2\cdot5-3$
$8m\:-\:6\:>2m\:+\:6$
$\left(\left(-2\right).\left(-2\right)+\left(-3\right)\right)^2.\left(-5\right)-5$
$\left(\left(49x\right)\right)^{12}-36y^{34}$
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