$\sqrt{x^2+y^2};\:x=3;\:y=-4$
$18x^3-15x+12x^2-10$
$-3b+3+21b-2$
$\left(\:y\:+\:5\right)\:\:\left(z\:-\:8\:\right)\:$
$\frac{2x+1}{3x-11}=9$
$4\cdot8-9\cdot9$
$\frac{95.36\left(-0.14\right)}{\left(-83.7\right)\cdot2.936}$
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