$1-\sin x=\frac{\left(\cos x\right)^2}{1+\sin x}$
$x+1\sqrt{3x^2}-2x+7$
$\lim_{x\to-\infty}\left(e^{3x}\right)$
$60x^2-120xy+100y^2$
$\int\ln\left(3x^5\right)dx$
$\int\frac{5x^2+4x+12}{x^3+2x^2+4x+8}dx$
$\left(6\:+\:x\right)\:\left(6\:-\:x\right)$
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