$-4x^2-49x-151=-7x^2-82x-235$
$\sqrt{\frac{9ab^4}{3b^3}}$
$\left(-t^4-4t+1\right)^2$
$2\sin^2u-\sin u-1=0$
$f^2-16f+64$
$\int\left(\frac{1}{x\left(x+1\right)\left(x+3\right)}\right)dx$
$sin^4\left(y\right)-cos^4\left(y\right)+1=2sin^2\left(y\right)$
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