$x^2=y-3$
$cosy-7x^4+7=0$
$\lim_{x\to0}\left(\frac{e^x\cos\left(x\right)}{4\sin\left(x\right)}\right)$
$\left(4ab^4+6ab^3+5b\right)^2$
$6ab+8b$
$\left(5g^2+7\right)\left(5g^2-7\right)$
$75\cdot3$
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