$\ang\alpha+\cot g^{2}\alpha^{2}-\csc^{2}\alpha$
$\frac{x-1}{x^3+x}$
$17\:-\:6\:+\:4\:-\:12\:+\:3\:-\:4\:-\:9\:+\:8$
$2\left(4-13x^2\right)^2$
$\int\left(sin^7x-4sin^2x-sinx\right)cosx\:dx$
$\frac{33}{10}-\frac{1.898}{1}$
$4x^2-6x+3y-4x^2+5x-3-2y$
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