$15a-3ab+4b-20$
$xy^{'\:}+y=\frac{4}{3}x^3+3x^2$
$x^2+3x+15>0$
$-27x^2+5x+4$
$\int\frac{w^2}{\left(w^2+c^2\right)^{\frac{3}{2}}}dw$
$7x\left(4x-3\right)-14\left(4x-3\right)$
$\left(6z^2-5w^3\right)^2$
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