$1-cot^2x-csc^2x$
$f+3+4-5f$
$\frac{64x^4+36}{8x^2-6}$
$x^2\:+\:40x\:+20$
$+2500-3000$
$-2x^3-5x^3-2x^3$
$\int7y^6\sqrt{1-7y^7}dy$
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