$\sec=4$
$\lim\:_{t\to\:0}\:\frac{3-3cos7t+6sen7t}{3t}\:$
$\int\left(1+\cos3x\right)\frac{3}{2}dx$
$2x^3-8x^2+2x+12$
$\sqrt{\left(25\right)}\cdot\left(4\right)$
$9.0\:x\:10^3$
$5\left(x^2-2y^3\right)^3$
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