$-ab;\:a=8;\:b=-4$
$1+-1+2+-2$
$\frac{e^{-x}x^3}{3}+\frac{1}{3}\int e^{-x}x^3dx$
$5e+e-5e$
$\frac{2}{3}\sqrt[3]{160m^4n^9p^2}$
$-\left(-7z-10\right)^2$
$\frac{\sin\left(157\right)\cdot\sin\left(67\right)}{\sin\left(46\right)}$
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