$x^2+30x-225$
$\sin\left(\frac{9\pi}{2}+x\right)=\cos\left(x\right)$
$2x^2-2-4$
$v^2+3v-2=0$
$b\:-8=9$
$a\left(a-b\right)^2+12\left(a-b\right)\left(a+b\right)+4\left(a+b\right)^2$
$\left(4x^3+8x-2\right)\left(x^2+4\right)$
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