$-3y^2+1-y^2$
$\left(2x+\frac{3}{x}\right)^2$
$3^3x\:3^5:\:3^2$
$400\cdot300$
$-0,02x^2-20x-100$
$\int_0^{\frac{3\pi}{2}}\left(cos2x\right)dx$
$f-f-f-f-f-f-f-f$
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