$3=x\cdot\left(\cos\left(30\right)\right)$

$\:\:\frac{\left(3x^2y\right)}{2}\:\left(\frac{4xy}{y^2}\right)$

$\int\frac{1}{\left(x^2+a^2\right)^{\frac{3}{2}}}dx$

$\int x^3\left(x^{0.5}\right)dx$

$\frac{2x^3}{x^{-2}}$

$4\left(3+5a\right)+2\left(2+7b\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{5-5sin\left(\theta\right)}{7+7cos\left(\theta\right)}\right)$