$9x^2+16y^2=25$
$73-\left(-48\right)-29$
$5^2-2\cdot4$
$\int\left(\frac{3x}{x^2+8x+25}\right)dx$
$\int\frac{5x^2-9x-4}{\left(x-1\right)\left(x^2+4\right)}dx$
$\left(2y+4\right)^2$
$-2\csc^2\left(0\right)\infty+2\cdot\cot^2\left(0\right)$
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