$\int_0^5\left(\frac{8}{x^2-x-2}\right)dx$
$x\:-7\:<\:4$
$\sin\left(a\right)\left(1+\tan\left(a\right)\right)=\tan\left(a\right)$
$\ln\left(2x\right)-\ln\left(x-4\right)=1$
$\frac{\tan c+\cot c}{\sec c}$
$x^3-2x-x+4$
$f\left(x\right)=1-\sqrt{3-7x}-2$
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