$15am\:+\:6xy\:+\:12a\:-9$
$\sin\left(x\right)\left(2\sin\left(x\right)+1\right)=4\cos^2\left(x\right)-3$
$\frac{1950}{-13}$
$-28+\left(-1\right)-\left(-1\right)$
$x+4=6$
$165\cdot5$
$\lim_{x\to\infty}\left(\frac{3^x}{x^3}\right)$
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