$3v^2-60v=-141$
$3^3+6^2+2^4$
$\int\frac{4x}{\left(x^2+2\right)\left(x^2+2x+3\right)}dx$
$\lim_{x\to-\infty}\sqrt{x^4+x}-x^2$
$\int\frac{1}{\sqrt{-4x-9}}dx$
$\left(5m-6n\right)\left(5m+6\right)$
$6x^2+42x=0$
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