$\frac{4}{n}+\frac{3}{2n}=\frac{1}{2}$
$\left(x^2-1\right)\left(x^2-11x+28\right)$
$\:\left(6x^3-10x-15\right)$
$x+y+z+w=6$
$\left(4x+5\right)\left(-44\right)$
$\left(4a+5ab\right)^2$
$y=\ln\left(2x^2\right)^{\sin x}$
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