$\int_1^{\sin\left(a\right)}\left(\sqrt{1-u^2}\right)du$
$e^7=y$
$\left(x-_{\frac{\:7\pi}{6}}\right)$
$\left(-1+1\right)\cdot\left(1+-1\right)+1$
$g^2+14g+49$
$\lim_{x\to1}\frac{x^2+3x-4}{x^2-3x+2}$
$\frac{\frac{x^2+6x+9}{x}}{x+3}$
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