$\frac{1}{x+2}\:+\frac{7x}{x-3}$
$\int\left(x+2\right)\cdot e^xdx$
$5\left(x^4+4x^2-6\right)-\left(2x^4-3x^3+5x+9\right)$
$tan^2a\:+cot^2a\:+2\:=\:sec^2\csc\left(a\right)^2$
$m^4-22m^2+40$
$x+94=300$
$\left(\sqrt[3]{x^2}+1\right).\left(\sqrt[3]{x}-1\right)$
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