<?php

print "exp(3) = " . exp(3) . "\n";
print "max(2,5) = " . max(2,5) . "\n";
print "max(5,2) = " . max(5,2) . "\n";
print "min(2,5) = " . min(2,5) . "\n";
print "min(5,2) = " . min(5,2) . "\n";
print "sqrt(3) = " . sqrt(3) . "\n";
print "sqrt('11.1a') = " . sqrt('a') . "\n";
print "ceil(sqrt(3)) = " . ceil(sqrt(3)) . "\n";
print "ceil(-10.5) = " . ceil(-10.5) . "\n";
print "ceil('10.5a') = " . ceil('a') . "\n";
print "floor(sqrt(3)) = " . floor(sqrt(3)) . "\n";
print "floor(-10.5) = " . floor(-10.5) . "\n";
print "floor(-10) = " . floor(-10) . "\n";
print "floor('45.3a') = " . floor('a') . "\n";
print "round(sqrt(3)) = " . round(sqrt(3)) . "\n";
print "round(-10.5) = " . round(-10.5) . "\n";
print "round('5.5a') = " . round('a') . "\n";
print "abs(10) = " . abs(10) . "\n";
print "abs(-10) = " . abs(-10) . "\n";
print "abs('a') = " . abs('a') . "\n";
print "abs([]) = " . print_r(abs([]), true) . "\n";
print "acos(1.0) = " . acos(1.0) . "\n";
print "acos('a') = " . acos('a') . "\n";
print "acosh(1.0) = " . acosh(1.0) . "\n";
print "acosh('a') = " . acosh('a') . "\n";
print "asin(1.0) = " . asin(1.0) . "\n";
print "asin('a') = " . asin('a') . "\n";
print "asinh(1.0) = " . asinh(1.0) . "\n";
print "asinh('a') = " . asinh('a') . "\n";
print "atan(1.0) = " . atan(1.0) . "\n";
print "atan('a') = " . atan('a') . "\n";
print "atanh(0.5) = " . floor(atanh(0.5) * 100) . " ( x 100 and floor)\n";
print "atanh('a') = " . atanh('a') . "\n";
print "atan2(1.0, 1.0) = " . atan2(1.0, 1.0) . "\n";
print "atan2('a', 'b') = " . atan2('a', 'b') . "\n";
print "atan2(1.0, 'b') = " . atan2(1.0, 'b') . "\n";
print "cos(1.0) = " . cos(1.0) . "\n";
print "cos('a') = " . cos('a') . "\n";
print "cosh(1.0) = " . cosh(1.0) . "\n";
print "cosh('a') = " . cosh('a') . "\n";
print "sin(1.0) = " . sin(1.0) . "\n";
print "sin('a') = " . sin('a') . "\n";
print "sinh(1.0) = " . sinh(1.0) . "\n";
print "sinh('a') = " . sinh('a') . "\n";
print "tan(1.0) = " . tan(1.0) . "\n";
print "tan('a') = " . tan('a') . "\n";
print "tanh(0.5) = " . tanh(0.5) . "\n";
print "tanh('a') = " . tanh('a') . "\n";
