$4x^4-5x^3+7x^2-21x-47;\:x=-3$
$x\:+\:8\:+\:5\left(x\:-\:4\right)$
$\int\frac{x\left(x^2-2\right)}{\left(x^2+1\right)}dx$
$\frac{16}{1}+\frac{16}{1}$
$6\cos^2x\tan x$
$\int\left(4-2\sqrt{y}\right)^2dy$
$9x^2y^5-6xy^7+21x^3y^{11}$
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