$100z^4-10z+14$
$\left(-3y+2\right)^2$
$\sin^2\left(a\right)\left(1+\tan^2\left(a\right)\right)$
$5x^4-3x^2+2x^2+6x$
$\frac{1}{2}\ln\left(x\right)+\ln\left(x+3\right)-4\ln\left(x\right)$
$\frac{1}{2}\left(6\right)^2\:-3$
$6x^2+5x-25$
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